Update BestBattleSnake Version to 2.6.0

add better enemy constrictor projection
add customisable timeout buffer with env variable
2026-04-03 21:40:31 +02:00 · 2026-04-03 21:39:08 +02:00 · 2026-04-03 21:23:18 +02:00 · 2026-04-03 21:17:08 +02:00 · 2026-04-03 20:57:33 +02:00 · 2026-04-03 20:44:03 +02:00
28 changed files with 2194 additions and 1350 deletions
@@ -7,4 +7,7 @@
 __pycache__/
 data/
 .env
 .tools/
 dbschema/migrations/
 *.jsonl
@@ -0,0 +1,6 @@
 [submodule "quart_common"]
 	path = quart_common
 	url = git@git.yiprawr.dev:submodules/python-quart-common.git
 [submodule "local-client"]
 	path = local-client
 	url = git@github.com:BattlesnakeOfficial/rules.git
@@ -90,6 +90,67 @@ Or with `just`:
 just export-dataset
 ```
 Curate a high-quality training subset (single file):
 ```sh
 python -m server.DatasetCurator --input good_moves-2026-04-03.jsonl --output data/dataset/best_moves.jsonl
 ```
 Curate from multiple JSONL sources (repeat `--input`):
 ```sh
 python -m server.DatasetCurator \
  --input good_moves-2026-04-03.jsonl \
  --input good_moves-2026-04-04.jsonl \
  --output data/dataset/best_moves.jsonl
 ```
 Curate from folder or glob:
 ```sh
 python -m server.DatasetCurator --input data/dataset --output data/dataset/best_moves.jsonl
 python -m server.DatasetCurator --input "good_moves-*.jsonl" --output data/dataset/best_moves.jsonl
 ```
 Append mode (keeps existing curated rows and deduplicates against them):
 ```sh
 python -m server.DatasetCurator --input "good_moves-*.jsonl" --output data/dataset/best_moves.jsonl --append
 ```
 Archive processed input files after curation:
 ```sh
 python -m server.DatasetCurator --input "good_moves-*.jsonl" --output data/dataset/best_moves.jsonl --append --archive-input
 python -m server.DatasetCurator --input "good_moves-*.jsonl" --output data/dataset/best_moves.jsonl --append --archive-input --archive-dir data/dataset/archive
 ```
 Or with `just`:
 ```sh
 just curate-dataset
 just curate-dataset append=true
 just curate-dataset append=true archive=true archive_dir=data/dataset/archive
 ```
 Analyze dataset quality overall and by day (best game overall/day included):
 ```sh
 python -m server.DatasetStats --input "good_moves-*.jsonl"
 python -m server.DatasetStats --input data/dataset --output data/dataset/stats-report.json
 ```
 The stats report now includes both:
 - `best_game` (survival/length focused)
 - `best_pressure_game` (high-pressure quality focused: fewer safe options + strong survival)
 Or with `just`:
 ```sh
 just analyze-dataset
 just analyze-dataset input=data/dataset output=data/dataset/stats-report.json
 ```
 To store compact dataset-only records (JSONL) and skip full per-game JSON files:
 ```sh
@@ -1,16 +1,5 @@
-from server.Server import Server
+from server.bootstrap import build_server_from_env
 import os
-server = Server(
+server = build_server_from_env(default_snake_type="TemplateSnake")
  data_path=os.path.dirname(__file__),
  snake_type=os.environ.get("SNAKE", "BestBattleSnake"),
  storage_type=os.environ.get("STORAGE", "LocalStorage"),
  store_game_when_win_and_moves_are_bigger_as=int(os.environ.get("STORE_IF_WIN_AND_MOVES_ARE_BIGGER_AS", 10)),
  debug=os.environ.get("DEBUG_SERVER", False),
  check_tls_security=False,
 )
 if os.environ.get("STORE_GAME_HISTORY", None):
  server.enable_store_game_state()
 app = server.app
@@ -1,661 +0,0 @@
                    GNU AFFERO GENERAL PUBLIC LICENSE
                       Version 3, 19 November 2007
 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.
                            Preamble
  The GNU Affero General Public License is a free, copyleft license for
 software and other kinds of works, specifically designed to ensure
 cooperation with the community in the case of network server software.
  The licenses for most software and other practical works are designed
 to take away your freedom to share and change the works.  By contrast,
 our General Public Licenses are intended to guarantee your freedom to
 share and change all versions of a program--to make sure it remains free
 software for all its users.
  When we speak of free software, we are referring to freedom, not
 price.  Our General Public Licenses are designed to make sure that you
 have the freedom to distribute copies of free software (and charge for
 them if you wish), that you receive source code or can get it if you
 want it, that you can change the software or use pieces of it in new
 free programs, and that you know you can do these things.
  Developers that use our General Public Licenses protect your rights
 with two steps: (1) assert copyright on the software, and (2) offer
 you this License which gives you legal permission to copy, distribute
 and/or modify the software.
  A secondary benefit of defending all users' freedom is that
 improvements made in alternate versions of the program, if they
 receive widespread use, become available for other developers to
 incorporate.  Many developers of free software are heartened and
 encouraged by the resulting cooperation.  However, in the case of
 software used on network servers, this result may fail to come about.
 The GNU General Public License permits making a modified version and
 letting the public access it on a server without ever releasing its
 source code to the public.
  The GNU Affero General Public License is designed specifically to
 ensure that, in such cases, the modified source code becomes available
 to the community.  It requires the operator of a network server to
 provide the source code of the modified version running there to the
 users of that server.  Therefore, public use of a modified version, on
 a publicly accessible server, gives the public access to the source
 code of the modified version.
  An older license, called the Affero General Public License and
 published by Affero, was designed to accomplish similar goals.  This is
 a different license, not a version of the Affero GPL, but Affero has
 released a new version of the Affero GPL which permits relicensing under
 this license.
  The precise terms and conditions for copying, distribution and
 modification follow.
                       TERMS AND CONDITIONS
  0. Definitions.
  "This License" refers to version 3 of the GNU Affero General Public License.
  "Copyright" also means copyright-like laws that apply to other kinds of
 works, such as semiconductor masks.
  "The Program" refers to any copyrightable work licensed under this
 License.  Each licensee is addressed as "you".  "Licensees" and
 "recipients" may be individuals or organizations.
  To "modify" a work means to copy from or adapt all or part of the work
 in a fashion requiring copyright permission, other than the making of an
 exact copy.  The resulting work is called a "modified version" of the
 earlier work or a work "based on" the earlier work.
  A "covered work" means either the unmodified Program or a work based
 on the Program.
  To "propagate" a work means to do anything with it that, without
 permission, would make you directly or secondarily liable for
 infringement under applicable copyright law, except executing it on a
 computer or modifying a private copy.  Propagation includes copying,
 distribution (with or without modification), making available to the
 public, and in some countries other activities as well.
  To "convey" a work means any kind of propagation that enables other
 parties to make or receive copies.  Mere interaction with a user through
 a computer network, with no transfer of a copy, is not conveying.
  An interactive user interface displays "Appropriate Legal Notices"
 to the extent that it includes a convenient and prominently visible
 feature that (1) displays an appropriate copyright notice, and (2)
 tells the user that there is no warranty for the work (except to the
 extent that warranties are provided), that licensees may convey the
 work under this License, and how to view a copy of this License.  If
 the interface presents a list of user commands or options, such as a
 menu, a prominent item in the list meets this criterion.
  1. Source Code.
  The "source code" for a work means the preferred form of the work
 for making modifications to it.  "Object code" means any non-source
 form of a work.
  A "Standard Interface" means an interface that either is an official
 standard defined by a recognized standards body, or, in the case of
 interfaces specified for a particular programming language, one that
 is widely used among developers working in that language.
  The "System Libraries" of an executable work include anything, other
 than the work as a whole, that (a) is included in the normal form of
 packaging a Major Component, but which is not part of that Major
 Component, and (b) serves only to enable use of the work with that
 Major Component, or to implement a Standard Interface for which an
 implementation is available to the public in source code form.  A
 "Major Component", in this context, means a major essential component
 (kernel, window system, and so on) of the specific operating system
 (if any) on which the executable work runs, or a compiler used to
 produce the work, or an object code interpreter used to run it.
  The "Corresponding Source" for a work in object code form means all
 the source code needed to generate, install, and (for an executable
 work) run the object code and to modify the work, including scripts to
 control those activities.  However, it does not include the work's
 System Libraries, or general-purpose tools or generally available free
 programs which are used unmodified in performing those activities but
 which are not part of the work.  For example, Corresponding Source
 includes interface definition files associated with source files for
 the work, and the source code for shared libraries and dynamically
 linked subprograms that the work is specifically designed to require,
 such as by intimate data communication or control flow between those
 subprograms and other parts of the work.
  The Corresponding Source need not include anything that users
 can regenerate automatically from other parts of the Corresponding
 Source.
  The Corresponding Source for a work in source code form is that
 same work.
  2. Basic Permissions.
  All rights granted under this License are granted for the term of
 copyright on the Program, and are irrevocable provided the stated
 conditions are met.  This License explicitly affirms your unlimited
 permission to run the unmodified Program.  The output from running a
 covered work is covered by this License only if the output, given its
 content, constitutes a covered work.  This License acknowledges your
 rights of fair use or other equivalent, as provided by copyright law.
  You may make, run and propagate covered works that you do not
 convey, without conditions so long as your license otherwise remains
 in force.  You may convey covered works to others for the sole purpose
 of having them make modifications exclusively for you, or provide you
 with facilities for running those works, provided that you comply with
 the terms of this License in conveying all material for which you do
 not control copyright.  Those thus making or running the covered works
 for you must do so exclusively on your behalf, under your direction
 and control, on terms that prohibit them from making any copies of
 your copyrighted material outside their relationship with you.
  Conveying under any other circumstances is permitted solely under
 the conditions stated below.  Sublicensing is not allowed; section 10
 makes it unnecessary.
  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
  No covered work shall be deemed part of an effective technological
 measure under any applicable law fulfilling obligations under article
 11 of the WIPO copyright treaty adopted on 20 December 1996, or
 similar laws prohibiting or restricting circumvention of such
 measures.
  When you convey a covered work, you waive any legal power to forbid
 circumvention of technological measures to the extent such circumvention
 is effected by exercising rights under this License with respect to
 the covered work, and you disclaim any intention to limit operation or
 modification of the work as a means of enforcing, against the work's
 users, your or third parties' legal rights to forbid circumvention of
 technological measures.
  4. Conveying Verbatim Copies.
  You may convey verbatim copies of the Program's source code as you
 receive it, in any medium, provided that you conspicuously and
 appropriately publish on each copy an appropriate copyright notice;
 keep intact all notices stating that this License and any
 non-permissive terms added in accord with section 7 apply to the code;
 keep intact all notices of the absence of any warranty; and give all
 recipients a copy of this License along with the Program.
  You may charge any price or no price for each copy that you convey,
 and you may offer support or warranty protection for a fee.
  5. Conveying Modified Source Versions.
  You may convey a work based on the Program, or the modifications to
 produce it from the Program, in the form of source code under the
 terms of section 4, provided that you also meet all of these conditions:
    a) The work must carry prominent notices stating that you modified
    it, and giving a relevant date.
    b) The work must carry prominent notices stating that it is
    released under this License and any conditions added under section
    7.  This requirement modifies the requirement in section 4 to
    "keep intact all notices".
    c) You must license the entire work, as a whole, under this
    License to anyone who comes into possession of a copy.  This
    License will therefore apply, along with any applicable section 7
    additional terms, to the whole of the work, and all its parts,
    regardless of how they are packaged.  This License gives no
    permission to license the work in any other way, but it does not
    invalidate such permission if you have separately received it.
    d) If the work has interactive user interfaces, each must display
    Appropriate Legal Notices; however, if the Program has interactive
    interfaces that do not display Appropriate Legal Notices, your
    work need not make them do so.
  A compilation of a covered work with other separate and independent
 works, which are not by their nature extensions of the covered work,
 and which are not combined with it such as to form a larger program,
 in or on a volume of a storage or distribution medium, is called an
 "aggregate" if the compilation and its resulting copyright are not
 used to limit the access or legal rights of the compilation's users
 beyond what the individual works permit.  Inclusion of a covered work
 in an aggregate does not cause this License to apply to the other
 parts of the aggregate.
  6. Conveying Non-Source Forms.
  You may convey a covered work in object code form under the terms
 of sections 4 and 5, provided that you also convey the
 machine-readable Corresponding Source under the terms of this License,
 in one of these ways:
    a) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by the
    Corresponding Source fixed on a durable physical medium
    customarily used for software interchange.
    b) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by a
    written offer, valid for at least three years and valid for as
    long as you offer spare parts or customer support for that product
    model, to give anyone who possesses the object code either (1) a
    copy of the Corresponding Source for all the software in the
    product that is covered by this License, on a durable physical
    medium customarily used for software interchange, for a price no
    more than your reasonable cost of physically performing this
    conveying of source, or (2) access to copy the
    Corresponding Source from a network server at no charge.
    c) Convey individual copies of the object code with a copy of the
    written offer to provide the Corresponding Source.  This
    alternative is allowed only occasionally and noncommercially, and
    only if you received the object code with such an offer, in accord
    with subsection 6b.
    d) Convey the object code by offering access from a designated
    place (gratis or for a charge), and offer equivalent access to the
    Corresponding Source in the same way through the same place at no
    further charge.  You need not require recipients to copy the
    Corresponding Source along with the object code.  If the place to
    copy the object code is a network server, the Corresponding Source
    may be on a different server (operated by you or a third party)
    that supports equivalent copying facilities, provided you maintain
    clear directions next to the object code saying where to find the
    Corresponding Source.  Regardless of what server hosts the
    Corresponding Source, you remain obligated to ensure that it is
    available for as long as needed to satisfy these requirements.
    e) Convey the object code using peer-to-peer transmission, provided
    you inform other peers where the object code and Corresponding
    Source of the work are being offered to the general public at no
    charge under subsection 6d.
  A separable portion of the object code, whose source code is excluded
 from the Corresponding Source as a System Library, need not be
 included in conveying the object code work.
  A "User Product" is either (1) a "consumer product", which means any
 tangible personal property which is normally used for personal, family,
 or household purposes, or (2) anything designed or sold for incorporation
 into a dwelling.  In determining whether a product is a consumer product,
 doubtful cases shall be resolved in favor of coverage.  For a particular
 product received by a particular user, "normally used" refers to a
 typical or common use of that class of product, regardless of the status
 of the particular user or of the way in which the particular user
 actually uses, or expects or is expected to use, the product.  A product
 is a consumer product regardless of whether the product has substantial
 commercial, industrial or non-consumer uses, unless such uses represent
 the only significant mode of use of the product.
  "Installation Information" for a User Product means any methods,
 procedures, authorization keys, or other information required to install
 and execute modified versions of a covered work in that User Product from
 a modified version of its Corresponding Source.  The information must
 suffice to ensure that the continued functioning of the modified object
 code is in no case prevented or interfered with solely because
 modification has been made.
  If you convey an object code work under this section in, or with, or
 specifically for use in, a User Product, and the conveying occurs as
 part of a transaction in which the right of possession and use of the
 User Product is transferred to the recipient in perpetuity or for a
 fixed term (regardless of how the transaction is characterized), the
 Corresponding Source conveyed under this section must be accompanied
 by the Installation Information.  But this requirement does not apply
 if neither you nor any third party retains the ability to install
 modified object code on the User Product (for example, the work has
 been installed in ROM).
  The requirement to provide Installation Information does not include a
 requirement to continue to provide support service, warranty, or updates
 for a work that has been modified or installed by the recipient, or for
 the User Product in which it has been modified or installed.  Access to a
 network may be denied when the modification itself materially and
 adversely affects the operation of the network or violates the rules and
 protocols for communication across the network.
  Corresponding Source conveyed, and Installation Information provided,
 in accord with this section must be in a format that is publicly
 documented (and with an implementation available to the public in
 source code form), and must require no special password or key for
 unpacking, reading or copying.
  7. Additional Terms.
  "Additional permissions" are terms that supplement the terms of this
 License by making exceptions from one or more of its conditions.
 Additional permissions that are applicable to the entire Program shall
 be treated as though they were included in this License, to the extent
 that they are valid under applicable law.  If additional permissions
 apply only to part of the Program, that part may be used separately
 under those permissions, but the entire Program remains governed by
 this License without regard to the additional permissions.
  When you convey a copy of a covered work, you may at your option
 remove any additional permissions from that copy, or from any part of
 it.  (Additional permissions may be written to require their own
 removal in certain cases when you modify the work.)  You may place
 additional permissions on material, added by you to a covered work,
 for which you have or can give appropriate copyright permission.
  Notwithstanding any other provision of this License, for material you
 add to a covered work, you may (if authorized by the copyright holders of
 that material) supplement the terms of this License with terms:
    a) Disclaiming warranty or limiting liability differently from the
    terms of sections 15 and 16 of this License; or
    b) Requiring preservation of specified reasonable legal notices or
    author attributions in that material or in the Appropriate Legal
    Notices displayed by works containing it; or
    c) Prohibiting misrepresentation of the origin of that material, or
    requiring that modified versions of such material be marked in
    reasonable ways as different from the original version; or
    d) Limiting the use for publicity purposes of names of licensors or
    authors of the material; or
    e) Declining to grant rights under trademark law for use of some
    trade names, trademarks, or service marks; or
    f) Requiring indemnification of licensors and authors of that
    material by anyone who conveys the material (or modified versions of
    it) with contractual assumptions of liability to the recipient, for
    any liability that these contractual assumptions directly impose on
    those licensors and authors.
  All other non-permissive additional terms are considered "further
 restrictions" within the meaning of section 10.  If the Program as you
 received it, or any part of it, contains a notice stating that it is
 governed by this License along with a term that is a further
 restriction, you may remove that term.  If a license document contains
 a further restriction but permits relicensing or conveying under this
 License, you may add to a covered work material governed by the terms
 of that license document, provided that the further restriction does
 not survive such relicensing or conveying.
  If you add terms to a covered work in accord with this section, you
 must place, in the relevant source files, a statement of the
 additional terms that apply to those files, or a notice indicating
 where to find the applicable terms.
  Additional terms, permissive or non-permissive, may be stated in the
 form of a separately written license, or stated as exceptions;
 the above requirements apply either way.
  8. Termination.
  You may not propagate or modify a covered work except as expressly
 provided under this License.  Any attempt otherwise to propagate or
 modify it is void, and will automatically terminate your rights under
 this License (including any patent licenses granted under the third
 paragraph of section 11).
  However, if you cease all violation of this License, then your
 license from a particular copyright holder is reinstated (a)
 provisionally, unless and until the copyright holder explicitly and
 finally terminates your license, and (b) permanently, if the copyright
 holder fails to notify you of the violation by some reasonable means
 prior to 60 days after the cessation.
  Moreover, your license from a particular copyright holder is
 reinstated permanently if the copyright holder notifies you of the
 violation by some reasonable means, this is the first time you have
 received notice of violation of this License (for any work) from that
 copyright holder, and you cure the violation prior to 30 days after
 your receipt of the notice.
  Termination of your rights under this section does not terminate the
 licenses of parties who have received copies or rights from you under
 this License.  If your rights have been terminated and not permanently
 reinstated, you do not qualify to receive new licenses for the same
 material under section 10.
  9. Acceptance Not Required for Having Copies.
  You are not required to accept this License in order to receive or
 run a copy of the Program.  Ancillary propagation of a covered work
 occurring solely as a consequence of using peer-to-peer transmission
 to receive a copy likewise does not require acceptance.  However,
 nothing other than this License grants you permission to propagate or
 modify any covered work.  These actions infringe copyright if you do
 not accept this License.  Therefore, by modifying or propagating a
 covered work, you indicate your acceptance of this License to do so.
  10. Automatic Licensing of Downstream Recipients.
  Each time you convey a covered work, the recipient automatically
 receives a license from the original licensors, to run, modify and
 propagate that work, subject to this License.  You are not responsible
 for enforcing compliance by third parties with this License.
  An "entity transaction" is a transaction transferring control of an
 organization, or substantially all assets of one, or subdividing an
 organization, or merging organizations.  If propagation of a covered
 work results from an entity transaction, each party to that
 transaction who receives a copy of the work also receives whatever
 licenses to the work the party's predecessor in interest had or could
 give under the previous paragraph, plus a right to possession of the
 Corresponding Source of the work from the predecessor in interest, if
 the predecessor has it or can get it with reasonable efforts.
  You may not impose any further restrictions on the exercise of the
 rights granted or affirmed under this License.  For example, you may
 not impose a license fee, royalty, or other charge for exercise of
 rights granted under this License, and you may not initiate litigation
 (including a cross-claim or counterclaim in a lawsuit) alleging that
 any patent claim is infringed by making, using, selling, offering for
 sale, or importing the Program or any portion of it.
  11. Patents.
  A "contributor" is a copyright holder who authorizes use under this
 License of the Program or a work on which the Program is based.  The
 work thus licensed is called the contributor's "contributor version".
  A contributor's "essential patent claims" are all patent claims
 owned or controlled by the contributor, whether already acquired or
 hereafter acquired, that would be infringed by some manner, permitted
 by this License, of making, using, or selling its contributor version,
 but do not include claims that would be infringed only as a
 consequence of further modification of the contributor version.  For
 purposes of this definition, "control" includes the right to grant
 patent sublicenses in a manner consistent with the requirements of
 this License.
  Each contributor grants you a non-exclusive, worldwide, royalty-free
 patent license under the contributor's essential patent claims, to
 make, use, sell, offer for sale, import and otherwise run, modify and
 propagate the contents of its contributor version.
  In the following three paragraphs, a "patent license" is any express
 agreement or commitment, however denominated, not to enforce a patent
 (such as an express permission to practice a patent or covenant not to
 sue for patent infringement).  To "grant" such a patent license to a
 party means to make such an agreement or commitment not to enforce a
 patent against the party.
  If you convey a covered work, knowingly relying on a patent license,
 and the Corresponding Source of the work is not available for anyone
 to copy, free of charge and under the terms of this License, through a
 publicly available network server or other readily accessible means,
 then you must either (1) cause the Corresponding Source to be so
 available, or (2) arrange to deprive yourself of the benefit of the
 patent license for this particular work, or (3) arrange, in a manner
 consistent with the requirements of this License, to extend the patent
 license to downstream recipients.  "Knowingly relying" means you have
 actual knowledge that, but for the patent license, your conveying the
 covered work in a country, or your recipient's use of the covered work
 in a country, would infringe one or more identifiable patents in that
 country that you have reason to believe are valid.
  If, pursuant to or in connection with a single transaction or
 arrangement, you convey, or propagate by procuring conveyance of, a
 covered work, and grant a patent license to some of the parties
 receiving the covered work authorizing them to use, propagate, modify
 or convey a specific copy of the covered work, then the patent license
 you grant is automatically extended to all recipients of the covered
 work and works based on it.
  A patent license is "discriminatory" if it does not include within
 the scope of its coverage, prohibits the exercise of, or is
 conditioned on the non-exercise of one or more of the rights that are
 specifically granted under this License.  You may not convey a covered
 work if you are a party to an arrangement with a third party that is
 in the business of distributing software, under which you make payment
 to the third party based on the extent of your activity of conveying
 the work, and under which the third party grants, to any of the
 parties who would receive the covered work from you, a discriminatory
 patent license (a) in connection with copies of the covered work
 conveyed by you (or copies made from those copies), or (b) primarily
 for and in connection with specific products or compilations that
 contain the covered work, unless you entered into that arrangement,
 or that patent license was granted, prior to 28 March 2007.
  Nothing in this License shall be construed as excluding or limiting
 any implied license or other defenses to infringement that may
 otherwise be available to you under applicable patent law.
  12. No Surrender of Others' Freedom.
  If conditions are imposed on you (whether by court order, agreement or
 otherwise) that contradict the conditions of this License, they do not
 excuse you from the conditions of this License.  If you cannot convey a
 covered work so as to satisfy simultaneously your obligations under this
 License and any other pertinent obligations, then as a consequence you may
 not convey it at all.  For example, if you agree to terms that obligate you
 to collect a royalty for further conveying from those to whom you convey
 the Program, the only way you could satisfy both those terms and this
 License would be to refrain entirely from conveying the Program.
  13. Remote Network Interaction; Use with the GNU General Public License.
  Notwithstanding any other provision of this License, if you modify the
 Program, your modified version must prominently offer all users
 interacting with it remotely through a computer network (if your version
 supports such interaction) an opportunity to receive the Corresponding
 Source of your version by providing access to the Corresponding Source
 from a network server at no charge, through some standard or customary
 means of facilitating copying of software.  This Corresponding Source
 shall include the Corresponding Source for any work covered by version 3
 of the GNU General Public License that is incorporated pursuant to the
 following paragraph.
  Notwithstanding any other provision of this License, you have
 permission to link or combine any covered work with a work licensed
 under version 3 of the GNU General Public License into a single
 combined work, and to convey the resulting work.  The terms of this
 License will continue to apply to the part which is the covered work,
 but the work with which it is combined will remain governed by version
 3 of the GNU General Public License.
  14. Revised Versions of this License.
  The Free Software Foundation may publish revised and/or new versions of
 the GNU Affero General Public License from time to time.  Such new versions
 will be similar in spirit to the present version, but may differ in detail to
 address new problems or concerns.
  Each version is given a distinguishing version number.  If the
 Program specifies that a certain numbered version of the GNU Affero General
 Public License "or any later version" applies to it, you have the
 option of following the terms and conditions either of that numbered
 version or of any later version published by the Free Software
 Foundation.  If the Program does not specify a version number of the
 GNU Affero General Public License, you may choose any version ever published
 by the Free Software Foundation.
  If the Program specifies that a proxy can decide which future
 versions of the GNU Affero General Public License can be used, that proxy's
 public statement of acceptance of a version permanently authorizes you
 to choose that version for the Program.
  Later license versions may give you additional or different
 permissions.  However, no additional obligations are imposed on any
 author or copyright holder as a result of your choosing to follow a
 later version.
  15. Disclaimer of Warranty.
  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
 APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
 OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
 IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
 ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
  16. Limitation of Liability.
  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGES.
  17. Interpretation of Sections 15 and 16.
  If the disclaimer of warranty and limitation of liability provided
 above cannot be given local legal effect according to their terms,
 reviewing courts shall apply local law that most closely approximates
 an absolute waiver of all civil liability in connection with the
 Program, unless a warranty or assumption of liability accompanies a
 copy of the Program in return for a fee.
                     END OF TERMS AND CONDITIONS
            How to Apply These Terms to Your New Programs
  If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
 free software which everyone can redistribute and change under these terms.
  To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively
 state the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published
    by the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.
    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 Also add information on how to contact you by electronic and paper mail.
  If your software can interact with users remotely through a computer
 network, you should also make sure that it provides a way for users to
 get its source.  For example, if your program is a web application, its
 interface could display a "Source" link that leads users to an archive
 of the code.  There are many ways you could offer source, and different
 solutions will be better for different programs; see section 13 for the
 specific requirements.
  You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU AGPL, see
 <http://www.gnu.org/licenses/>.
@@ -1,53 +0,0 @@
 # BattlesnakeOfficial/rules
 [![codecov](https://codecov.io/gh/BattlesnakeOfficial/rules/branch/master/graph/badge.svg)](https://codecov.io/gh/BattlesnakeOfficial/rules)
 [Battlesnake](https://play.battlesnake.com) rules and game logic, implemented as a Go module. This code is used in production at [play.battlesnake.com](https://play.battlesnake.com). Issues and contributions welcome!
 ## CLI for Running Battlesnake Games Locally
 This repo provides a simple CLI tool to run games locally against your dev environment.
 ### Installation
 Download precompiled binaries here: <br>
 [https://github.com/BattlesnakeOfficial/rules/releases](https://github.com/BattlesnakeOfficial/rules/releases)
 Install as a Go package. Requires Go 1.18 or higher. [[Download](https://golang.org/dl/)]
 ```
 go install github.com/BattlesnakeOfficial/rules/cli/battlesnake@latest
 ```
 Compile from source. Also requires Go 1.18 or higher.
 ```
 git clone git@github.com:BattlesnakeOfficial/rules.git
 cd rules
 go build -o battlesnake ./cli/battlesnake/main.go
 ```
 ### Usage
 Example command to run a game locally:
 ```
 battlesnake play -W 11 -H 11 --name <SNAKE_NAME> --url <SNAKE_URL> -g solo -v
 ```
 For more details, see the [CLI README](cli/README.md).
 ## FAQ
 ### Can I run games locally?
 Yes! [See the included CLI](cli/README.md).
 ### How is this different from the old Battlesnake engine?
 The [old game engine](https://github.com/battlesnakeio/engine) was re-written in early 2020 to handle a higher volume of concurrent games. As part of that rebuild we moved the game logic into a separate Go module that gets compiled into the production engine.
 This provides two benefits: it makes it much simpler/easier to build new game modes, and it allows the community to get more involved in game development (without the maintenance overhead of the entire game engine).
 ### Feedback
 * **Do you have an issue or suggestions for this repository?** Head over to our [Feedback Repository](https://play.battlesnake.com/feedback) today and let us know!
@@ -12,6 +12,9 @@ set dotenv-required := true
 # Use zsh
 set shell := ["bash", "-cu"]
 BATTLESNAKE_CLI_DIR := ".tools/battlesnake-cli"
 BATTLESNAKE_CLI_BIN := ".tools/battlesnake-cli/battlesnake"
 # ------------------------------------------------------------------------------
 #  Default
 # ------------------------------------------------------------------------------
@@ -28,23 +31,132 @@ default:
 run:
  "{{justfile_directory()}}/main.py"
 run-snake port="8000" snake="BestBattleSnake":
  HOST="127.0.0.1" PORT="{{port}}" SNAKE="{{snake}}" DEBUG="false" DEBUG_SERVER="false" "{{justfile_directory()}}/main.py"
 run-4-snakes base_port="9101" snake="BestBattleSnake":
  #!/usr/bin/env bash
  set -euo pipefail
  pids=()
  for i in 0 1 2 3; do
    port="$(({{base_port}} + i))"
    echo "Starting snake on :$port"
    HOST="127.0.0.1" PORT="$port" SNAKE="{{snake}}" DEBUG="false" DEBUG_SERVER="false" "{{justfile_directory()}}/main.py" &
    pids[$i]="$!"
  done
  cleanup() {
    for pid in "${pids[@]}"; do
      kill "$pid" 2>/dev/null || true
    done
    wait || true
  }
  trap cleanup EXIT INT TERM
  wait
 bench-best-snake iterations="1000":
  #!/usr/bin/env bash
  set -euo pipefail
  PYTHONPATH="{{justfile_directory()}}" python "{{justfile_directory()}}/tests/bench_best_battle_snake.py" --iterations "{{iterations}}"
 build-battlesnake-cli:
  #!/usr/bin/env bash
  set -euo pipefail
  install_dir="{{justfile_directory()}}/{{BATTLESNAKE_CLI_DIR}}"
  bin_path="{{justfile_directory()}}/{{BATTLESNAKE_CLI_BIN}}"
  mkdir -p "$install_dir"
  if [ ! -f "{{justfile_directory()}}/local-client/go.mod" ]; then
    echo "Missing local-client source. Run: git submodule update --init --recursive"
    exit 1
  fi
  (
    cd "{{justfile_directory()}}/local-client"
    go build -o "$bin_path" ./cli/battlesnake/main.go
  )
  "$bin_path" --help > /dev/null
  echo "Built Battlesnake CLI at $bin_path"
 battlesnake-cli-version:
  #!/usr/bin/env bash
  set -euo pipefail
  "{{justfile_directory()}}/{{BATTLESNAKE_CLI_BIN}}" --help
 # ------------------------------------------------------------------------------
 #  Testing helpers
 # ------------------------------------------------------------------------------
-test-constrictor:
+test-constrictor: build-battlesnake-cli
  #!/usr/bin/env bash
  set -euo pipefail
-  BATTLESNAKE_CLI=battlesnake_cli_1.2.3_Linux_x86_64/battlesnake
+  BATTLESNAKE_CLI="{{justfile_directory()}}/{{BATTLESNAKE_CLI_BIN}}"
-  $BATTLESNAKE_CLI play -W 11 -H 11 --name 'Python Starter Project' --url http://localhost:8000 -g constrictor --browser --minimumFood 0
+  "$BATTLESNAKE_CLI" play -W 11 -H 11 --name 'Python Starter Project' --url http://localhost:8000 -g constrictor --browser --minimumFood 0
-test-seed:
+test-seed: build-battlesnake-cli
  #!/usr/bin/env bash
  set -euo pipefail
-  BATTLESNAKE_CLI=battlesnake_cli_1.2.3_Linux_x86_64/battlesnake
+  BATTLESNAKE_CLI="{{justfile_directory()}}/{{BATTLESNAKE_CLI_BIN}}"
-  $BATTLESNAKE_CLI play -W 11 -H 11 --name 'Python Starter Project' --url http://localhost:8000 -g solo --browser --seed 1713099635738952360
+  "$BATTLESNAKE_CLI" play -W 11 -H 11 --name 'Python Starter Project' --url http://localhost:8000 -g solo --browser --seed 1713099635738952360
 test-local-4 mode="standard" map="standard" base_port="9101" snake="BestBattleSnake" seed="1713099635738952360" browser="true": build-battlesnake-cli
  #!/usr/bin/env bash
  set -euo pipefail
  BATTLESNAKE_CLI="{{justfile_directory()}}/{{BATTLESNAKE_CLI_BIN}}"
  LOG_DIR="{{justfile_directory()}}/.tools/snake-logs"
  mkdir -p "$LOG_DIR"
  pids=()
  for i in 0 1 2 3; do
    port="$(({{base_port}} + i))"
    log_file="$LOG_DIR/snake-$((i+1)).log"
    echo "Starting snake-$((i+1)) on :$port (log: $log_file)"
    HOST="127.0.0.1" PORT="$port" SNAKE="{{snake}}" DEBUG="false" DEBUG_SERVER="false" "{{justfile_directory()}}/main.py" > >(tee "$log_file") 2>&1 &
    pids[$i]="$!"
  done
  cleanup() {
    for pid in "${pids[@]}"; do
      kill "$pid" 2>/dev/null || true
    done
    wait || true
  }
  trap cleanup EXIT INT TERM
  for i in 0 1 2 3; do
    port="$(({{base_port}} + i))"
    for _ in $(seq 1 30); do
      if curl -fsS "http://127.0.0.1:$port" >/dev/null 2>&1; then
        break
      fi
      sleep 0.2
    done
    if ! curl -fsS "http://127.0.0.1:$port" >/dev/null 2>&1; then
      echo "Snake on :$port did not start correctly. Check logs in $LOG_DIR"
      exit 1
    fi
  done
  BROWSER_FLAG=""
  if [ "{{browser}}" = "true" ]; then
    BROWSER_FLAG="--browser"
  fi
  "$BATTLESNAKE_CLI" play -W 11 -H 11 \
    --name "Snake 1" --url "http://127.0.0.1:{{base_port}}" \
    --name "Snake 2" --url "http://127.0.0.1:$(({{base_port}} + 1))" \
    --name "Snake 3" --url "http://127.0.0.1:$(({{base_port}} + 2))" \
    --name "Snake 4" --url "http://127.0.0.1:$(({{base_port}} + 3))" \
    -g "{{mode}}" --map "{{map}}" --seed "{{seed}}" $BROWSER_FLAG
 # ------------------------------------------------------------------------------
 #  Fataset helpers
@@ -52,3 +164,9 @@ test-seed:
 export-dataset input="data" output="data/dataset/good_moves.jsonl":
  python -m server.DatasetExporter --input "{{input}}" --output "{{output}}"
 curate-dataset input="good_moves-*.jsonl" output="data/dataset/best_moves.jsonl" min_turn="6" late_turn="20" max_safe_options="2" min_score="3" append="false" archive="false" archive_dir="":
  FLAGS=""; if [ "{{append}}" = "true" ]; then FLAGS="$FLAGS --append"; fi; if [ "{{archive}}" = "true" ]; then FLAGS="$FLAGS --archive-input"; fi; if [ -n "{{archive_dir}}" ]; then FLAGS="$FLAGS --archive-dir {{archive_dir}}"; fi; python -m server.DatasetCurator --input "{{input}}" --output "{{output}}" --min-turn "{{min_turn}}" --late-turn "{{late_turn}}" --max-safe-options "{{max_safe_options}}" --min-score "{{min_score}}" $FLAGS
 analyze-dataset input="good_moves-*.jsonl" output="":
  if [ -n "{{output}}" ]; then python -m server.DatasetStats --input "{{input}}" --output "{{output}}"; else python -m server.DatasetStats --input "{{input}}"; fi
@@ -13,8 +13,9 @@
 # For more info see docs.battlesnake.com
 from server.CreateEnvironmentFile import CreateEnvironmentFile
-from server.Server import Server
+from server.bootstrap import build_run_config, build_server_from_env
 import asyncio
 import os
 # Start server when `python main.py` is run
@@ -24,23 +25,7 @@ if __name__ == "__main__":
      "STORE_GAME_HISTORY": True,
      "DEBUG": True,
      "SNAKE": "TemplateSnake",
      "STORE_IF_WIN_AND_MOVES_ARE_BIGGER_AS": 10,
    })
-  server = Server(
+  server = build_server_from_env(default_snake_type="TemplateSnake")
-    data_path=os.path.dirname(__file__),
+  asyncio.run(server.run(**build_run_config()))
    snake_type=os.environ.get("SNAKE", "TemplateSnake"),
    storage_type=os.environ.get("STORAGE", "LocalStorage"),
    store_game_when_win_and_moves_are_bigger_as=int(os.environ.get("STORE_IF_WIN_AND_MOVES_ARE_BIGGER_AS", 10)),
    debug=os.environ.get("DEBUG_SERVER", False),
    check_tls_security=False,
  )
  if os.environ.get("STORE_GAME_HISTORY", None):
    server.enable_store_game_state()
  server.run(
    host=os.environ.get("HOST", "0.0.0.0"),
    port=int(os.environ.get("PORT", "8000")),
    debug=bool(os.environ.get("DEBUG", False)),
  )
@@ -5,6 +5,7 @@ description = "Add your description here"
 readme = "README.md"
 requires-python = ">=3.13"
 dependencies = [
    "aiologger>=0.7.0",
    "dotenv>=0.9.9",
    "gel>=3.1.0",
    "quart>=0.20.0",
@@ -0,0 +1,280 @@
 import argparse
 import glob
 import hashlib
 import json
 import shutil
 from pathlib import Path
 class DatasetCurator:
  def __init__(
    self,
    input_files: list[str],
    output_file: str,
    min_turn: int = 6,
    late_turn: int = 20,
    max_safe_options: int = 2,
    min_score: int = 3,
    append: bool = False,
    archive_input: bool = False,
    archive_dir: str | None = None,
  ):
    self.input_files = input_files
    self.output_file = Path(output_file)
    self.min_turn = min_turn
    self.late_turn = late_turn
    self.max_safe_options = max_safe_options
    self.min_score = min_score
    self.append = append
    self.archive_input = archive_input
    self.archive_dir = (
      Path(archive_dir) if archive_dir else self.output_file.parent / "archive"
    )
  def _resolve_input_files(self):
    resolved = []
    seen = set()
    for item in self.input_files:
      path = Path(item)
      if path.is_dir():
        for file_path in sorted(path.rglob("*.jsonl")):
          key = str(file_path.resolve())
          if key in seen:
            continue
          seen.add(key)
          resolved.append(file_path)
        continue
      if any(ch in item for ch in "*?[]"):
        for match in sorted(glob.glob(item)):
          file_path = Path(match)
          if not file_path.is_file():
            continue
          key = str(file_path.resolve())
          if key in seen:
            continue
          seen.add(key)
          resolved.append(file_path)
        continue
      if path.is_file():
        key = str(path.resolve())
        if key in seen:
          continue
        seen.add(key)
        resolved.append(path)
    return resolved
  def _safe_options_count(self, row: dict):
    history = row.get("history", {})
    for item in history.get("data", []):
      if item.get("function") == "get_possible_moves":
        return len(item.get("safe_positions", {}))
    return None
  def _state_hash(self, row: dict):
    board = row.get("game_board", {})
    snakes = board.get("snakes", [])
    snakes_key = []
    for snake in snakes:
      snakes_key.append(
        (
          snake.get("id"),
          snake.get("health"),
          tuple(
            (seg.get("x"), seg.get("y")) for seg in snake.get("body", [])
          ),
        )
      )
    key = {
      "width": board.get("width"),
      "height": board.get("height"),
      "snakes": sorted(snakes_key),
      "food": sorted((f.get("x"), f.get("y")) for f in board.get("food", [])),
      "hazards": sorted(
        (h.get("x"), h.get("y")) for h in board.get("hazards", [])
      ),
    }
    raw = json.dumps(key, sort_keys=True, separators=(",", ":"))
    return hashlib.sha1(raw.encode("utf-8")).hexdigest()
  def _score(self, row: dict):
    score = 0
    turn = int(row.get("turn", 0))
    safe_options = self._safe_options_count(row)
    snakes = row.get("game_board", {}).get("snakes", [])
    opponents = max(0, len(snakes) - 1)
    if turn >= self.late_turn:
      score += 2
    if safe_options is not None and safe_options <= self.max_safe_options:
      score += 3
    if opponents >= 1:
      score += 1
    return score, safe_options
  def curate(self):
    self.output_file.parent.mkdir(parents=True, exist_ok=True)
    input_paths = self._resolve_input_files()
    total = 0
    kept = 0
    skipped_turn = 0
    skipped_quality = 0
    skipped_duplicate = 0
    seen_states = set()
    if self.append and self.output_file.exists():
      with self.output_file.open("r", encoding="utf-8") as existing:
        for line in existing:
          if not line.strip():
            continue
          row = json.loads(line)
          state_key = self._state_hash(row)
          seen_states.add((state_key, row.get("move")))
    mode = "a" if self.append else "w"
    with self.output_file.open(mode, encoding="utf-8") as dst:
      for input_path in input_paths:
        with input_path.open("r", encoding="utf-8") as src:
          for line in src:
            if not line.strip():
              continue
            total += 1
            row = json.loads(line)
            if not row.get("is_good_move", False):
              skipped_quality += 1
              continue
            if int(row.get("turn", 0)) < self.min_turn:
              skipped_turn += 1
              continue
            quality_score, safe_options = self._score(row)
            if quality_score < self.min_score:
              skipped_quality += 1
              continue
            state_key = self._state_hash(row)
            dedupe_key = (state_key, row.get("move"))
            if dedupe_key in seen_states:
              skipped_duplicate += 1
              continue
            seen_states.add(dedupe_key)
            compact_row = {
              "game_id": row.get("game_id"),
              "turn": row.get("turn"),
              "move": row.get("move"),
              "game_type": row.get("game_type"),
              "quality_score": quality_score,
              "safe_options": safe_options,
              "game_board": row.get("game_board"),
            }
            dst.write(json.dumps(compact_row, ensure_ascii=False) + "\n")
            kept += 1
    archived_files = []
    if self.archive_input:
      archived_files = self._archive_processed_files(input_paths)
    return {
      "input_files": [str(path) for path in input_paths],
      "total_rows": total,
      "kept_rows": kept,
      "skipped_turn": skipped_turn,
      "skipped_quality": skipped_quality,
      "skipped_duplicate": skipped_duplicate,
      "append_mode": self.append,
      "archive_input": self.archive_input,
      "archived_files": archived_files,
      "output_file": str(self.output_file),
    }
  def _archive_processed_files(self, input_paths: list[Path]):
    self.archive_dir.mkdir(parents=True, exist_ok=True)
    archived = []
    output_resolved = (
      self.output_file.resolve()
      if self.output_file.exists()
      else self.output_file
    )
    archive_resolved = self.archive_dir.resolve()
    for source_path in input_paths:
      if not source_path.exists():
        continue
      source_resolved = source_path.resolve()
      if source_resolved == output_resolved:
        continue
      if source_resolved.parent == archive_resolved:
        continue
      destination = self.archive_dir / source_path.name
      if destination.exists():
        stem = destination.stem
        suffix = destination.suffix
        index = 1
        while True:
          candidate = self.archive_dir / f"{stem}.{index}{suffix}"
          if not candidate.exists():
            destination = candidate
            break
          index += 1
      shutil.move(str(source_path), str(destination))
      archived.append(str(destination))
    return archived
 if __name__ == "__main__":
  parser = argparse.ArgumentParser(description="Create curated best-moves dataset")
  parser.add_argument(
    "--input",
    action="append",
    required=True,
    help="Input JSONL file, directory, or glob pattern. Repeat for multiple inputs.",
  )
  parser.add_argument("--output", required=True, help="Output JSONL file")
  parser.add_argument("--min-turn", type=int, default=6)
  parser.add_argument("--late-turn", type=int, default=20)
  parser.add_argument("--max-safe-options", type=int, default=2)
  parser.add_argument("--min-score", type=int, default=3)
  parser.add_argument(
    "--append",
    action="store_true",
    help="Append to existing output and dedupe against existing rows",
  )
  parser.add_argument(
    "--archive-input",
    action="store_true",
    help="Move processed input files to archive directory after successful curation",
  )
  parser.add_argument(
    "--archive-dir",
    default=None,
    help="Archive directory for processed input files (default: <output-dir>/archive)",
  )
  args = parser.parse_args()
  report = DatasetCurator(
    input_files=args.input,
    output_file=args.output,
    min_turn=args.min_turn,
    late_turn=args.late_turn,
    max_safe_options=args.max_safe_options,
    min_score=args.min_score,
    append=args.append,
    archive_input=args.archive_input,
    archive_dir=args.archive_dir,
  ).curate()
  print(json.dumps(report, indent=2))
@@ -0,0 +1,247 @@
 import argparse
 import glob
 import json
 import re
 from collections import Counter, defaultdict
 from datetime import datetime
 from pathlib import Path
 class DatasetStats:
  DAY_PATTERN = re.compile(r"(\d{4}-\d{2}-\d{2})")
  def __init__(self, input_files: list[str]):
    self.input_files = input_files
  def _resolve_input_files(self):
    resolved = []
    seen = set()
    for item in self.input_files:
      path = Path(item)
      if path.is_dir():
        for file_path in sorted(path.rglob("*.jsonl")):
          key = str(file_path.resolve())
          if key in seen:
            continue
          seen.add(key)
          resolved.append(file_path)
        continue
      if any(ch in item for ch in "*?[]"):
        for match in sorted(glob.glob(item)):
          file_path = Path(match)
          if not file_path.is_file():
            continue
          key = str(file_path.resolve())
          if key in seen:
            continue
          seen.add(key)
          resolved.append(file_path)
        continue
      if path.is_file():
        key = str(path.resolve())
        if key in seen:
          continue
        seen.add(key)
        resolved.append(path)
    return resolved
  def _infer_day(self, file_path: Path):
    match = self.DAY_PATTERN.search(file_path.name)
    if match:
      return match.group(1)
    return datetime.fromtimestamp(file_path.stat().st_mtime).strftime("%Y-%m-%d")
  def _game_score(self, game: dict):
    max_turn = game["max_turn"]
    rows = game["rows"]
    avg_safe = game["avg_safe_options"]
    pressure_bonus = 0 if avg_safe is None else max(0.0, 4.0 - avg_safe)
    return round(max_turn * 2.0 + rows + pressure_bonus, 3)
  def _pressure_score(self, game: dict):
    max_turn = game["max_turn"]
    rows = max(1, game["rows"])
    pressure_turns = game["pressure_turns"]
    avg_safe = game["avg_safe_options"]
    pressure_ratio = pressure_turns / rows
    safe_tightness = 0.0 if avg_safe is None else max(0.0, 3.0 - avg_safe)
    return round(max_turn * 1.2 + pressure_ratio * 120.0 + safe_tightness * 20.0, 3)
  def _extract_safe_options(self, row: dict):
    top_level = row.get("safe_options")
    if isinstance(top_level, int):
      return top_level
    history = row.get("history", {})
    for item in history.get("data", []):
      if item.get("function") != "get_possible_moves":
        continue
      safe_positions = item.get("safe_positions", {})
      if isinstance(safe_positions, dict):
        return len(safe_positions)
    return None
  def analyze(self):
    files = self._resolve_input_files()
    totals = {
      "rows": 0,
      "games": set(),
      "snake_types": Counter(),
      "game_types": Counter(),
      "moves": Counter(),
      "days": Counter(),
    }
    games = {}
    day_games = defaultdict(set)
    for file_path in files:
      day = self._infer_day(file_path)
      with file_path.open("r", encoding="utf-8") as source:
        for line in source:
          if not line.strip():
            continue
          row = json.loads(line)
          game_id = row.get("game_id")
          if not game_id:
            continue
          turn = int(row.get("turn", 0))
          safe_options = self._extract_safe_options(row)
          snake_type = row.get("snake_type", "unknown")
          move = row.get("move", "unknown")
          game_type = row.get("game_type", {})
          if isinstance(game_type, dict):
            game_type_name = game_type.get("name", "unknown")
          else:
            game_type_name = str(game_type)
          totals["rows"] += 1
          totals["games"].add(game_id)
          totals["snake_types"][snake_type] += 1
          totals["game_types"][game_type_name] += 1
          totals["moves"][move] += 1
          totals["days"][day] += 1
          if game_id not in games:
            games[game_id] = {
              "game_id": game_id,
              "day": day,
              "snake_type": snake_type,
              "game_type": game_type_name,
              "rows": 0,
              "max_turn": -1,
              "safe_options_sum": 0,
              "safe_options_count": 0,
              "pressure_turns": 0,
            }
          game = games[game_id]
          game["rows"] += 1
          game["max_turn"] = max(game["max_turn"], turn)
          if isinstance(safe_options, int):
            game["safe_options_sum"] += safe_options
            game["safe_options_count"] += 1
            if safe_options <= 2:
              game["pressure_turns"] += 1
          day_games[day].add(game_id)
    game_summaries = []
    for game in games.values():
      avg_safe = None
      if game["safe_options_count"] > 0:
        avg_safe = round(
          game["safe_options_sum"] / game["safe_options_count"], 3
        )
      item = {
        "game_id": game["game_id"],
        "day": game["day"],
        "snake_type": game["snake_type"],
        "game_type": game["game_type"],
        "rows": game["rows"],
        "max_turn": game["max_turn"],
        "avg_safe_options": avg_safe,
        "pressure_turns": game["pressure_turns"],
      }
      item["score"] = self._game_score(item)
      item["pressure_score"] = self._pressure_score(item)
      game_summaries.append(item)
    game_summaries.sort(
      key=lambda x: (x["score"], x["max_turn"], x["rows"]), reverse=True
    )
    best_overall = game_summaries[0] if game_summaries else None
    pressure_sorted = sorted(
      game_summaries,
      key=lambda x: (x["pressure_score"], x["max_turn"], x["rows"]),
      reverse=True,
    )
    best_pressure_overall = pressure_sorted[0] if pressure_sorted else None
    by_day = {}
    for day, game_ids in sorted(day_games.items()):
      day_list = [item for item in game_summaries if item["game_id"] in game_ids]
      day_list.sort(
        key=lambda x: (x["score"], x["max_turn"], x["rows"]), reverse=True
      )
      day_pressure = sorted(
        day_list,
        key=lambda x: (x["pressure_score"], x["max_turn"], x["rows"]),
        reverse=True,
      )
      by_day[day] = {
        "rows": totals["days"][day],
        "games": len(game_ids),
        "best_game": day_list[0] if day_list else None,
        "best_pressure_game": day_pressure[0] if day_pressure else None,
      }
    return {
      "files_scanned": [str(path) for path in files],
      "overall": {
        "rows": totals["rows"],
        "games": len(totals["games"]),
        "snake_types": dict(totals["snake_types"]),
        "game_types": dict(totals["game_types"]),
        "moves": dict(totals["moves"]),
        "best_game": best_overall,
        "best_pressure_game": best_pressure_overall,
      },
      "by_day": by_day,
      "top_games": game_summaries[:10],
      "top_pressure_games": pressure_sorted[:10],
    }
 if __name__ == "__main__":
  parser = argparse.ArgumentParser(description="Analyze Battlesnake JSONL datasets")
  parser.add_argument(
    "--input",
    action="append",
    required=True,
    help="Input JSONL file, directory, or glob pattern. Repeat for multiple inputs.",
  )
  parser.add_argument(
    "--output",
    default=None,
    help="Optional path to write JSON report",
  )
  args = parser.parse_args()
  report = DatasetStats(args.input).analyze()
  print(json.dumps(report, indent=2))
  if args.output:
    output_path = Path(args.output)
    output_path.parent.mkdir(parents=True, exist_ok=True)
    output_path.write_text(json.dumps(report, indent=2), encoding="utf-8")
@@ -16,12 +16,13 @@ class GameBoard:
    self.ruleset = ruleset
    self.map = map
    self.url = self._get_game_url(True if ruleset["version"] == "cli" else False)
    self.timeout = 500
  # Setter Functions
  def _set_snakes(self, snakes:list[dict]):
    self.other_snakes = [ x for x in snakes if x["id"] != self.my_snake["id"] ]
-  def _set_my_snake(self, my_snake:str):
+  def _set_my_snake(self, my_snake:dict):
    self.my_snake = my_snake
  def _set_food(self, food:list[dict]):
@@ -61,6 +62,15 @@ class GameBoard:
  def get_type(self):
    return self.type
  def get_map(self):
    return self.map
  def get_ruleset(self):
    return self.ruleset
  def get_timeout(self):
    return self.timeout
  def get_my_snake_head(self):
    return self.my_snake["head"]
@@ -79,7 +89,7 @@ class GameBoard:
      "width": self.width,
      "snakes": snakes,
      "food": self.food,
-      "hazards": self.hazards
+      "hazards": self.hazards,
    }
  # Game Functions
@@ -91,6 +101,7 @@ class GameBoard:
    self._set_snakes(game_data['board']['snakes'])
    self._set_turn(game_data["turn"])
    self.timeout = int(game_data.get('game', {}).get('timeout', 500))
  async def start_game(self, game_data:dict):
    self.init_snakes = len(game_data['board']['snakes'])
@@ -1,6 +1,9 @@
 from server.Files import read_file
 from server.GameBoard import GameBoard
-from server.SnakeBuilder import SnakeBuilder
+from snakes import SnakeBuilder
 from quart_common.web.logger import await_log
 from quart_common.web.logger import build_logger
 from typing import cast
 from server.storage.StorageLoader import StorageLoader
@@ -8,9 +11,16 @@ from quart import Quart, request, jsonify
 import logging, json, os, re
 class Server:
-  default_snake_config = {"apiversion":"1","author":"","color":"#888888","head":"default","tail":"default"}
+  default_snake_config = {
    'apiversion': '1',
    'author': '',
    'color': '#888888',
    'head': 'default',
    'tail': 'default',
    'version': '1.0.0',
  }
-  def __init__(self, data_path:str, snake_type:str, storage_type:str, debug:bool=False, store_game_when_win_and_moves_are_bigger_as:int=10, check_tls_security:bool=False):
+  def __init__(self, data_path:str, snake_type:str, storage_type:str, debug:bool=False, check_tls_security:bool=False):
    self.debug = debug
    self.snake_type = snake_type
    self.storage_type = storage_type
@@ -20,124 +30,179 @@ class Server:
    self.check_tls_security = check_tls_security
    self.store_game_state = False
    self.store_game_when_win_and_moves_are_bigger_as = store_game_when_win_and_moves_are_bigger_as
    self.running_games:dict[str, GameBoard] = {}
    self.game_move_counts:dict[str, int] = {}
    self.metrics = {
      'games_started': 0,
      'games_ended': 0,
      'wins': 0,
      'losses': 0,
      'total_moves': 0,
      'total_turns': 0,
      'max_turn': 0,
    }
    self.logger = build_logger('Battlesnake', debug_env_var='DEBUG_SERVER')
    self.snake_version = self._get_snake_version()
-    self.app = Quart("Battlesnake")
+    self.app = Quart('Battlesnake')
    # info is called when you create your Battlesnake on play.battlesnake.com
    # and controls your Battlesnake's appearance
    # TIP: If you open your Battlesnake URL in a browser you should see this data
-    @self.app.get("/")
+    @self.app.get('/')
    async def on_info():
      snake_config = await self._read_json_config_or_create()
-      print("INFO Snake:", snake_config)
+      await await_log(self.logger.info(f'INFO Snake: {snake_config}'))
      return snake_config
    # start is called when your Battlesnake begins a game
-    @self.app.post("/start")
+    @self.app.post('/start')
    async def on_start():
      game_state = await request.get_json()
      await self._create_game_board(game_state)
-      print("GAME START:", game_state["game"])
+      await await_log(self.logger.info(f'GAME START: {game_state['game']}'))
-      return "ok"
+      return 'ok'
    # move is called when your Battlesnake game is running game
-    @self.app.post("/move")
+    @self.app.post('/move')
    async def on_move():
      game_state = await request.get_json()
      game_board = await self._get_game_board(game_state)
      next_move = game_board.snake_neat_make_a_move()
      if self.debug:
-        print("TURN:", f'{game_state["turn"]:3},', "MOVE:", f"{next_move:5}")
+        await await_log(self.logger.debug(f'TURN: {game_state['turn']:3}, MOVE: {next_move:5}'))
-      return {"move": next_move}
+      return {'move': next_move}
    # end is called when your Battlesnake finishes a game
-    @self.app.post("/end")
+    @self.app.post('/end')
    async def on_end():
      game_state = await request.get_json()
      if self.store_game_state:
        game_board = await self._get_game_board(game_state, end=True)
        #if not game_board.get_winner() == "me" and not game_board.get_turn() <= self.store_game_when_win_and_moves_are_bigger_as:
        if self.check_tls_security:
          await game_board.save(
            StorageLoader.build(self.storage_type),
            file_path=os.path.join(self.data_path, 'data'),
-            database=os.getenv("EDGEDB_DATABASE", None),
+            database=os.getenv('EDGEDB_DATABASE', None),
            tls_security=None
          )
        else:
          await game_board.save(
            StorageLoader.build(self.storage_type),
            file_path=os.path.join(self.data_path, 'data'),
-            database=os.getenv("EDGEDB_DATABASE", None),
+            database=os.getenv('EDGEDB_DATABASE', None),
          )
-      print("GAME ENDED: Winner is", [ x["name"] for x in game_state["board"]['snakes']])
+      await await_log(self.logger.info(f'GAME ENDED: Winner is {[x['name'] for x in game_state['board']['snakes']]}'))
      self._delete_game_board(game_state)
-      return "ok"
+      return 'ok'
    @self.app.after_request
    async def identify_server(response):
-      response.headers.set(
+      response.headers.set('server', 'battlesnake/gitea/snake-python')
        "server", "battlesnake/gitea/snake-python"
      )
      return response
-    @self.app.get("/cleanup")
+    @self.app.get('/cleanup')
    async def cleanup():
      results = self._cleanup_database()
      return jsonify(data=json.loads(results), status=200)
-  def run(self, host:str="0.0.0.0", port:str="8000", debug:bool=False):
+    @self.app.get('/metrics')
-    logging.getLogger("werkzeug").setLevel(logging.ERROR)
+    async def metrics():
      return jsonify(self._build_metrics())
-    print(f"\nRunning Battlesnake at http://{host}:{port} with the {' '.join(re.findall('[A-Z][^A-Z]*', self.snake_type))}")
+    @self.app.get('/metrics/prometheus')
-    self.app.run(host=host, port=port, debug=debug)
+    async def metrics_prometheus():
      return (
        self._build_prometheus_metrics(),
        200,
        {'Content-Type': 'text/plain; version=0.0.4; charset=utf-8'},
      )
-  async def _read_json_config_or_create(self):
+  async def run(self, host:str='0.0.0.0', port:int=8000, debug:bool=False):
-    snake_config = await read_file(self.config_file, json.load)
+    logging.getLogger('werkzeug').setLevel(logging.ERROR)
    await await_log(self.logger.info(f'Running Battlesnake at http://{host}:{port} with the {" ".join(re.findall("[A-Z][^A-Z]*", self.snake_type))}'))
    await self.app.run_task(host=host, port=port, debug=debug)
  async def _read_json_config_or_create(self) -> dict[str, str]:
    snake_config = cast(dict[str, str]|None, await read_file(self.config_file, json.load))
    if not snake_config:
      return await self._override_snake_config_with_environment_variables(self.default_snake_config)
    return await self._override_snake_config_with_environment_variables(snake_config)
-  async def _override_snake_config_with_environment_variables(self, config: dict[str, str]) -> dict[str, str]:
+  async def _override_snake_config_with_environment_variables(self, config:dict[str, str]) -> dict[str, str]:
-    for key in ("author", "color", "head", "tail"):
+    config['version'] = self.snake_version
-      value = os.environ.get(f"SNAKE_{key.upper()}")
+
    for key in ('author', 'color', 'head', 'tail'):
      value = os.environ.get(f'SNAKE_{key.upper()}')
      if value is not None:
        config[key] = value
    version_override = os.environ.get('SNAKE_VERSION')
    if version_override is not None:
      config['version'] = version_override
    return config
  def _get_snake_version(self) -> str:
    configured_version = SnakeBuilder.get_version(self.snake_type)
    if configured_version:
      return configured_version
    try:
      snake = SnakeBuilder.build(self.snake_type)
    except Exception:
      return self.default_snake_config['version']
    version = getattr(snake, 'version', None)
    if version is None:
      version = getattr(snake, 'VERSION', None)
    if not version:
      return self.default_snake_config['version']
    return str(version)
  async def _create_game_board(self, game_state:dict):
    game_id = game_state['game']['id']
    new_game_board = GameBoard(
-      game_id=game_state["game"]["id"],
+      game_id=game_id,
      width=game_state['board']['width'],
      height=game_state['board']['height'],
-      ruleset=game_state['game']["ruleset"],
+      ruleset=game_state['game']['ruleset'],
      source=game_state['game']['source'],
      map=game_state['game']['map'],
-      snake_class=SnakeBuilder.build(self.snake_type)
+      snake_class=SnakeBuilder.build(self.snake_type),
    )
    await new_game_board.start_game(game_state)
-    self.running_games[game_state["game"]["id"]] = new_game_board
+    self.running_games[game_id] = new_game_board
    self.game_move_counts[game_id] = 0
    self.metrics['games_started'] += 1
    return new_game_board
-  def _delete_game_board(self, game_state):
+  def _delete_game_board(self, game_state:dict):
-    del self.running_games[game_state["game"]["id"]]
+    game_id = game_state['game']['id']
    del self.running_games[game_id]
    self.game_move_counts.pop(game_id, None)
-  async def _get_game_board(self, game_state:str, end:bool=False):
+  async def _get_game_board(self, game_state:dict, end:bool=False):
    game_id = game_state['game']['id']
    try:
-      game_board = self.running_games[game_state["game"]["id"]]
+      game_board = self.running_games[game_id]
    except KeyError:
      game_board = await self._create_game_board(game_state)
    if not end:
      self.metrics['total_moves'] += 1
      self.game_move_counts[game_id] = self.game_move_counts.get(game_id, 0) + 1
    game_board.read_game_data(game_state)
    if end:
      self._record_game_end(game_state)
      game_board.end_game(game_state)
    return game_board
@@ -148,3 +213,71 @@ class Server:
  def _cleanup_database(self):
    storage = StorageLoader.build(self.storage_type)()
    return storage.cleanup()
  def _record_game_end(self, game_state: dict):
    self.metrics['games_ended'] += 1
    final_turn = int(game_state.get('turn', 0))
    self.metrics['total_turns'] += final_turn
    self.metrics['max_turn'] = max(self.metrics['max_turn'], final_turn)
    you_id = game_state.get('you', {}).get('id')
    alive_snakes = game_state.get('board', {}).get('snakes', [])
    alive_ids = {snake.get('id') for snake in alive_snakes}
    if you_id and you_id in alive_ids:
      self.metrics['wins'] += 1
    else:
      self.metrics['losses'] += 1
  def _build_metrics(self) -> dict:
    games_ended = self.metrics['games_ended']
    avg_turns = self.metrics['total_turns'] / games_ended if games_ended else 0.0
    win_rate = self.metrics['wins'] / games_ended if games_ended else 0.0
    return {
      **self.metrics,
      'active_games': len(self.running_games),
      'tracked_games': len(self.game_move_counts),
      'avg_turns_per_game': round(avg_turns, 2),
      'win_rate': round(win_rate, 4),
    }
  def _build_prometheus_metrics(self) -> str:
    snapshot = self._build_metrics()
    lines = [
      '# HELP snake_games_started_total Total games started by snake server.',
      '# TYPE snake_games_started_total counter',
      f'snake_games_started_total {snapshot['games_started']}',
      '# HELP snake_games_ended_total Total games ended by snake server.',
      '# TYPE snake_games_ended_total counter',
      f'snake_games_ended_total {snapshot['games_ended']}',
      '# HELP snake_wins_total Total games won by this snake.',
      '# TYPE snake_wins_total counter',
      f'snake_wins_total {snapshot['wins']}',
      '# HELP snake_losses_total Total games lost by this snake.',
      '# TYPE snake_losses_total counter',
      f'snake_losses_total {snapshot['losses']}',
      '# HELP snake_moves_total Total move decisions served by /move.',
      '# TYPE snake_moves_total counter',
      f'snake_moves_total {snapshot['total_moves']}',
      '# HELP snake_turns_total Total turns across all ended games.',
      '# TYPE snake_turns_total counter',
      f'snake_turns_total {snapshot['total_turns']}',
      '# HELP snake_active_games Currently active games in memory.',
      '# TYPE snake_active_games gauge',
      f'snake_active_games {snapshot['active_games']}',
      '# HELP snake_tracked_games Currently tracked game IDs for move counters.',
      '# TYPE snake_tracked_games gauge',
      f'snake_tracked_games {snapshot['tracked_games']}',
      '# HELP snake_max_turn Highest final turn seen in an ended game.',
      '# TYPE snake_max_turn gauge',
      f'snake_max_turn {snapshot['max_turn']}',
      '# HELP snake_avg_turns_per_game Average final turn per ended game.',
      '# TYPE snake_avg_turns_per_game gauge',
      f'snake_avg_turns_per_game {snapshot['avg_turns_per_game']}',
      '# HELP snake_win_rate Win ratio from ended games (0.0 - 1.0).',
      '# TYPE snake_win_rate gauge',
      f'snake_win_rate {snapshot['win_rate']}',
    ]
    return '\n'.join(lines) + '\n'
@@ -1,7 +0,0 @@
 class SnakeBuilder:
  @classmethod
  def build(self, selected_snake:str):
    snake_module = __import__(f'snakes.{selected_snake}', fromlist=[selected_snake])
    snake_class = getattr(snake_module, selected_snake)
    return snake_class()
@@ -0,0 +1,39 @@
 from typing import TypedDict
 from pathlib import Path
 import os
 from server.Server import Server
 class RunConfig(TypedDict):
  host: str
  port: int
  debug: bool
 def env_bool(name:str, default:bool=False) -> bool:
  value = os.environ.get(name)
  if value is None:
    return default
  return value.lower() in {'1', 'true', 'yes', 'on'}
 def build_server_from_env(default_snake_type:str) -> Server:
  data_path = str(Path(__file__).resolve().parent.parent)
  server = Server(
    data_path=data_path,
    snake_type=os.environ.get('SNAKE', default_snake_type),
    storage_type=os.environ.get('STORAGE', 'LocalStorage'),
    debug=env_bool('DEBUG_SERVER'),
    check_tls_security=False,
  )
  if env_bool('STORE_GAME_HISTORY'):
    server.enable_store_game_state()
  return server
 def build_run_config() -> RunConfig:
  return {
    'host': os.environ.get('HOST', '0.0.0.0'),
    'port': int(os.environ.get('PORT', '8000')),
    'debug': env_bool('DEBUG'),
  }
@@ -1,11 +1,19 @@
 from collections.abc import Iterator
 from collections import deque
 from typing import Any, cast
-import random
+import random, os
-import os
+from time import perf_counter
 from snakes.TemplateSnake import TemplateSnake
 class BestBattleSnake(TemplateSnake):
  VERSION = "2.6.0"
  Point = tuple[int, int]
  Coord = dict[str, int]
  SnakeState = dict[str, Any]
  MoveMap = dict[str, Coord]
  AttackMap = dict[Point, int]
  DIRECTIONS = {
    "up": (0, 1),
    "down": (0, -1),
@@ -23,12 +31,16 @@ class BestBattleSnake(TemplateSnake):
  def __init__(self):
    super().__init__()
    self.name = "BestBattleSnake"
    self.version = self.VERSION
    self.recent_heads = deque(maxlen=14)
    self.last_move = None
    self.last_game_id = None
    self.previous_hazards = set()
    self.duel_style = self._get_duel_style()
    self.timeout_buffer_ms = self._get_timeout_buffer_ms()
-  def _get_duel_style(self):
+  def _get_duel_style(self) -> str:
    """Resolve duel tuning style from `BATTLE_SNAKE_DUEL_STYLE` or `DUEL_STYLE`."""
    value = os.getenv("BATTLE_SNAKE_DUEL_STYLE")
    if value is None:
      value = os.getenv("DUEL_STYLE", "balanced")
@@ -38,7 +50,8 @@ class BestBattleSnake(TemplateSnake):
      return "balanced"
    return style
-  def _duel_weights(self, style):
+  def _duel_weights(self, style:str) -> dict[str, float]:
    """Return score multipliers for the selected duel style preset."""
    if style == "safe":
      return {
        "head_pressure": 0.65,
@@ -57,16 +70,32 @@ class BestBattleSnake(TemplateSnake):
      "food_bias": 1.00,
    }
-  def choose_move(self, game_data):
+  def _get_timeout_buffer_ms(self) -> int:
    """Read response-time safety buffer from `SNAKE_TIMEOUT_BUFFER_MS`."""
    raw_value = os.getenv("SNAKE_TIMEOUT_BUFFER_MS", "120")
    try:
      return max(25, int(raw_value))
    except ValueError:
      return 120
  def choose_move(self, game_data:dict) -> str:
    """Pick the next move from a Battlesnake move request.
    Docs: https://docs.battlesnake.com/api/example-move
    """
    self.game_board = game_data
    self.calculations = []
    self.duel_style = self._get_duel_style()
    self.timeout_buffer_ms = self._get_timeout_buffer_ms()
    timeout_ms = (game_data.get_timeout() if hasattr(game_data, "get_timeout") else 500)
    deadline = perf_counter() + (max(50, int(timeout_ms) - self.timeout_buffer_ms) / 1000.0)
    game_id = getattr(game_data, "id", None)
    turn = game_data.get_turn()
    if game_id != self.last_game_id or turn <= 1:
      self.recent_heads.clear()
      self.last_move = None
      self.previous_hazards = set()
      self.last_game_id = game_id
    my_snake = cast(dict[str, Any], game_data.get_my_snake())
@@ -87,6 +116,16 @@ class BestBattleSnake(TemplateSnake):
    food_set = {(food["x"], food["y"]) for food in foods}
    hazard_set = {(hazard["x"], hazard["y"]) for hazard in hazards}
    previous_hazard_set = set(self.previous_hazards)
    hazard_damage = self._hazard_damage_per_turn(game_data)
    enemy_heads = [
      (snake["head"]["x"], snake["head"]["y"]) for snake in other_snakes
    ]
    enemy_can_grow_cache = {
      snake["id"]: self._enemy_can_grow_this_turn(snake, food_set)
      for snake in other_snakes
      if "id" in snake
    }
    current_head_point = (my_head["x"], my_head["y"])
    safe_moves = self._legal_moves(
@@ -110,6 +149,7 @@ class BestBattleSnake(TemplateSnake):
          "reason": "no_safe_moves",
        }
      )
      self.previous_hazards = set(hazard_set)
      return fallback
    enemy_attack_map = self._build_enemy_attack_map(
@@ -119,6 +159,7 @@ class BestBattleSnake(TemplateSnake):
      is_constrictor=is_constrictor,
      width=width,
      height=height,
      enemy_can_grow_cache=enemy_can_grow_cache,
    )
    if is_constrictor:
@@ -129,12 +170,16 @@ class BestBattleSnake(TemplateSnake):
        other_snakes=other_snakes,
        food_set=food_set,
        enemy_attack_map=enemy_attack_map,
        enemy_heads=enemy_heads,
        enemy_can_grow_cache=enemy_can_grow_cache,
        width=width,
        height=height,
        deadline=deadline,
      )
      self.recent_heads.append(current_head_point)
      self.last_move = best_move
      self.add_to_history({"turn": turn, "move": best_move, "scores": scores})
      self.previous_hazards = set(hazard_set)
      return best_move
    if len(other_snakes) == 1:
@@ -143,23 +188,28 @@ class BestBattleSnake(TemplateSnake):
        my_body=my_body,
        my_len=my_len,
        my_health=my_health,
        foods=foods,
        food_set=food_set,
        hazards=hazards,
        hazard_set=hazard_set,
        other_snakes=other_snakes,
        enemy_attack_map=enemy_attack_map,
        enemy_can_grow_cache=enemy_can_grow_cache,
        previous_hazard_set=previous_hazard_set,
        hazard_damage=hazard_damage,
        width=width,
        height=height,
        deadline=deadline,
      )
      self.recent_heads.append(current_head_point)
      self.last_move = best_move
      self.add_to_history({"turn": turn, "move": best_move, "scores": scores})
      self.previous_hazards = set(hazard_set)
      return best_move
-    scores: dict[str, float] = {}
+    scores:dict[str, float] = {}
-    move_safety: dict[str, dict[str, Any]] = {}
+    move_safety:dict[str, dict[str, Any]] = {}
    for move, pos in safe_moves.items():
      if self._time_exceeded(deadline):
        break
      point = (pos["x"], pos["y"])
      ate_food = point in food_set
@@ -169,6 +219,7 @@ class BestBattleSnake(TemplateSnake):
        other_snakes=other_snakes,
        food_set=food_set,
        is_constrictor=is_constrictor,
        enemy_can_grow_cache=enemy_can_grow_cache,
      )
      blocked.discard(point)
@@ -180,17 +231,13 @@ class BestBattleSnake(TemplateSnake):
      )
      territory = self._territory_control_score(
        my_start=point,
-        enemy_starts=[
+        enemy_starts=enemy_heads,
          (snake["head"]["x"], snake["head"]["y"]) for snake in other_snakes
        ],
        blocked=blocked,
        width=width,
        height=height,
      )
-      nearest_food_dist = self._nearest_food_distance(
+      nearest_food_dist = self._nearest_food_distance(point, food_set, blocked, width, height)
        point, foods, blocked, width, height
      )
      future_tail = future_body[-1]
      tail_point = (future_tail["x"], future_tail["y"])
      tail_dist = self._path_distance(
@@ -242,7 +289,9 @@ class BestBattleSnake(TemplateSnake):
        score -= 40.0
      if point in hazard_set:
-        score -= 70.0 if my_health > 35 else 250.0
+        hazard_scale = max(0.5, hazard_damage / 14.0)
        if not ate_food:
          score -= (70.0 if my_health > 35 else 250.0) * hazard_scale
      score -= self._revisit_penalty(point)
@@ -256,8 +305,9 @@ class BestBattleSnake(TemplateSnake):
        score -= 20.0
      health_after_move = 100 if ate_food else my_health - 1
-      if point in hazard_set:
+      hazard_active = self._hazard_is_active(point, ate_food, hazard_set, previous_hazard_set)
-        health_after_move -= 15
+      if hazard_active:
        health_after_move -= hazard_damage
      if health_after_move <= 0:
        score -= 10000.0
@@ -274,6 +324,18 @@ class BestBattleSnake(TemplateSnake):
      scores[move] = round(score, 5)
    if not scores:
      quick_move = (
        self.last_move
        if self.last_move in safe_moves
        else random.choice(list(safe_moves.keys()))
      )
      self.recent_heads.append(current_head_point)
      self.last_move = quick_move
      self.add_to_history({"turn": turn, "move": quick_move, "reason": "timeout_budget"})
      self.previous_hazards = set(hazard_set)
      return quick_move
    survivable_moves = [
      move for move, data in move_safety.items() if data["is_survivable"]
    ]
@@ -305,32 +367,24 @@ class BestBattleSnake(TemplateSnake):
    self.recent_heads.append(current_head_point)
    self.last_move = best_move
    self.add_to_history({"turn": turn, "move": best_move, "scores": scores})
    self.previous_hazards = set(hazard_set)
    return best_move
-  def _choose_duel_move(
+  def _choose_duel_move(self, safe_moves:MoveMap, my_body:list[Coord], my_len:int, my_health:int, food_set:set[Point], hazard_set:set[Point], other_snakes:list[SnakeState], enemy_attack_map:AttackMap, enemy_can_grow_cache:dict[Any, bool], previous_hazard_set:set[Point], hazard_damage:int, width:int, height:int, deadline:float|None=None) -> tuple[str, dict[str, float]]:
-    self,
+    """Score and select a move for one-vs-one games."""
    safe_moves,
    my_body,
    my_len,
    my_health,
    foods,
    food_set,
    hazards,
    hazard_set,
    other_snakes,
    enemy_attack_map,
    width,
    height,
  ):
    duel_weights = self._duel_weights(self.duel_style)
    enemy = other_snakes[0]
    enemy_head = (enemy["head"]["x"], enemy["head"]["y"])
    enemy_len = enemy.get("length", len(enemy["body"]))
    encase_target_space = max(8, enemy_len * 2)
    can_head_hunt = my_len > enemy_len and my_len >= 8
-    scores: dict[str, float] = {}
+    scores:dict[str, float] = {}
-    move_safety: dict[str, dict[str, Any]] = {}
+    move_safety:dict[str, dict[str, Any]] = {}
    for move, pos in safe_moves.items():
      if self._time_exceeded(deadline):
        break
      point = (pos["x"], pos["y"])
      ate_food = point in food_set
@@ -342,6 +396,7 @@ class BestBattleSnake(TemplateSnake):
        other_snakes=other_snakes,
        food_set=food_set,
        is_constrictor=False,
        enemy_can_grow_cache=enemy_can_grow_cache,
      )
      blocked.discard(point)
@@ -352,9 +407,7 @@ class BestBattleSnake(TemplateSnake):
        future_body, blocked, width, height
      )
-      nearest_food_dist = self._nearest_food_distance(
+      nearest_food_dist = self._nearest_food_distance(point, food_set, blocked, width, height)
        point, foods, blocked, width, height
      )
      future_tail = future_body[-1]
      tail_point = (future_tail["x"], future_tail["y"])
      tail_dist = self._path_distance(
@@ -380,6 +433,7 @@ class BestBattleSnake(TemplateSnake):
        enemy_attack_len is not None and enemy_attack_len >= my_len
      )
      direct_head_distance = self._manhattan(point, enemy_head)
      enemy_space, enemy_options = self._enemy_confinement_metrics(enemy_head, blocked, width, height)
      score = 0.0
      score += reachable_space * 2.8
@@ -393,7 +447,16 @@ class BestBattleSnake(TemplateSnake):
      if losing_head_to_head:
        score -= 1500.0
-      if my_len > enemy_len:
+      is_safe_tightening_move = not likely_dead_end and not losing_head_to_head
      if is_safe_tightening_move and enemy_space <= encase_target_space:
        score += (encase_target_space - enemy_space) * 42.0
        score += max(0, 3 - enemy_options) * 95.0
        if reachable_space > enemy_space:
          score += 120.0
        if direct_head_distance <= 2 and can_head_hunt:
          score += 40.0
      if can_head_hunt:
        if direct_head_distance == 1:
          score += 220.0 * duel_weights["head_pressure"]
        elif direct_head_distance == 2:
@@ -401,6 +464,8 @@ class BestBattleSnake(TemplateSnake):
      else:
        if direct_head_distance <= 2:
          score -= 120.0 * duel_weights["distance_safety"]
        if direct_head_distance == 1:
          score -= 180.0 * duel_weights["distance_safety"]
      hunger_urgency = max(0.0, (65.0 - my_health) / 65.0)
      if nearest_food_dist is not None:
@@ -420,7 +485,9 @@ class BestBattleSnake(TemplateSnake):
        score -= 50.0
      if point in hazard_set:
-        score -= 70.0 if my_health > 35 else 250.0
+        hazard_scale = max(0.5, hazard_damage / 14.0)
        if not ate_food:
          score -= (70.0 if my_health > 35 else 250.0) * hazard_scale
      score -= self._revisit_penalty(point)
@@ -434,8 +501,9 @@ class BestBattleSnake(TemplateSnake):
        score -= 20.0
      health_after_move = 100 if ate_food else my_health - 1
-      if point in hazard_set:
+      hazard_active = self._hazard_is_active(point, ate_food, hazard_set, previous_hazard_set)
-        health_after_move -= 15
+      if hazard_active:
        health_after_move -= hazard_damage
      if health_after_move <= 0:
        score -= 10000.0
@@ -472,27 +540,23 @@ class BestBattleSnake(TemplateSnake):
    else:
      considered_moves = list(scores.keys())
    if not scores:
      return random.choice(list(safe_moves.keys())), {}
    best_score = max(scores[move] for move in considered_moves)
    top_moves = [
      move for move in considered_moves if best_score - scores[move] <= 1.5
    ]
    return random.choice(top_moves), scores
-  def _choose_constrictor_move(
+  def _choose_constrictor_move(self, safe_moves:MoveMap, my_body:list[Coord], my_len:int, other_snakes:list[SnakeState], food_set:set[Point], enemy_attack_map:AttackMap, enemy_heads:list[Point], enemy_can_grow_cache:dict[Any, bool], width:int, height:int, deadline:float|None=None) -> tuple[str, dict[str, float]]:
-    self,
+    """Score and select a move for constrictor games."""
-    safe_moves,
+    scores:dict[str, float] = {}
-    my_body,
+    move_safety:dict[str, dict[str, Any]] = {}
    my_len,
    other_snakes,
    food_set,
    enemy_attack_map,
    width,
    height,
  ):
    scores: dict[str, float] = {}
    move_safety: dict[str, dict[str, Any]] = {}
    for move, pos in safe_moves.items():
      if self._time_exceeded(deadline):
        break
      point = (pos["x"], pos["y"])
      future_body = self._future_body(
        my_body, pos, ate_food=False, is_constrictor=True
@@ -502,6 +566,7 @@ class BestBattleSnake(TemplateSnake):
        other_snakes=other_snakes,
        food_set=food_set,
        is_constrictor=True,
        enemy_can_grow_cache=enemy_can_grow_cache,
      )
      blocked.discard(point)
@@ -513,9 +578,13 @@ class BestBattleSnake(TemplateSnake):
      )
      territory = self._territory_control_score(
        my_start=point,
-        enemy_starts=[
+        enemy_starts=enemy_heads,
-          (snake["head"]["x"], snake["head"]["y"]) for snake in other_snakes
+        blocked=blocked,
-        ],
+        width=width,
        height=height,
      )
      enemy_best_space, enemy_total_options = self._enemy_constrictor_projection(
        other_snakes=other_snakes,
        blocked=blocked,
        width=width,
        height=height,
@@ -533,6 +602,13 @@ class BestBattleSnake(TemplateSnake):
      score += liberties * 24.0
      score += next_options * 16.0
      score += territory * 0.65
      score += (reachable_space - enemy_best_space) * 3.2
      score += (max(0, 8 - enemy_total_options)) * 18.0
      if enemy_total_options <= 2:
        score += 110.0
      if enemy_best_space > int(reachable_space * 1.2):
        score -= 320.0
      if is_dead_end:
        score -= 2600.0
@@ -577,22 +653,24 @@ class BestBattleSnake(TemplateSnake):
    else:
      considered_moves = list(scores.keys())
    if not scores:
      return random.choice(list(safe_moves.keys())), {}
    best_score = max(scores[move] for move in considered_moves)
    top_moves = [
      move for move in considered_moves if best_score - scores[move] <= 2.0
    ]
    return random.choice(top_moves), scores
-  def _legal_moves(
+  def _legal_moves(self, my_head:Coord, my_body:list[Coord], other_snakes:list[SnakeState], food_set:set[Point], is_constrictor:bool, width:int, height:int) -> MoveMap:
-    self, my_head, my_body, other_snakes, food_set, is_constrictor, width, height
+    """Return legal immediate moves after body, wall, and tail checks."""
  ):
    occupied = self._occupied_cells(my_body, other_snakes)
    own_tail = (my_body[-1]["x"], my_body[-1]["y"])
    own_tail_stacked = self._is_tail_stacked(my_body)
    safe_moves = {}
-    for move, pos in self.get_possible_moves(my_head).items():
+    for move, (dx, dy) in self.DIRECTIONS.items():
-      point = (pos["x"], pos["y"])
+      point = (my_head["x"] + dx, my_head["y"] + dy)
      if not self._in_bounds(point, width, height):
        continue
@@ -608,17 +686,19 @@ class BestBattleSnake(TemplateSnake):
      if point in occupied and not can_step_on_tail:
        continue
-      safe_moves[move] = pos
+      safe_moves[move] = {"x": point[0], "y": point[1]}
    return safe_moves
-  def _occupied_cells(self, my_body, other_snakes):
+  def _occupied_cells(self, my_body:list[Coord], other_snakes:list[SnakeState]) -> set[Point]:
    """Build a set of occupied coordinates for all snake bodies."""
    occupied = {(segment["x"], segment["y"]) for segment in my_body}
    for snake in other_snakes:
      occupied |= {(segment["x"], segment["y"]) for segment in snake["body"]}
    return occupied
-  def _simulation_blocked(self, future_body, other_snakes, food_set, is_constrictor):
+  def _simulation_blocked(self, future_body:list[Coord], other_snakes:list[SnakeState], food_set:set[Point], is_constrictor:bool, enemy_can_grow_cache:dict[Any, bool]|None=None) -> set[Point]:
    """Build blocked cells for evaluating the board one turn ahead."""
    blocked = {(segment["x"], segment["y"]) for segment in future_body}
    if not is_constrictor and not self._is_tail_stacked(future_body):
@@ -632,7 +712,13 @@ class BestBattleSnake(TemplateSnake):
      if is_constrictor:
        continue
-      if self._enemy_can_grow_this_turn(snake, food_set):
+      snake_id = snake.get("id")
      enemy_can_grow = (
        enemy_can_grow_cache.get(snake_id)
        if enemy_can_grow_cache and snake_id is not None
        else self._enemy_can_grow_this_turn(snake, food_set)
      )
      if enemy_can_grow:
        continue
      if self._is_tail_stacked(snake["body"]):
@@ -643,20 +729,26 @@ class BestBattleSnake(TemplateSnake):
    return blocked
-  def _build_enemy_attack_map(
+  def _build_enemy_attack_map(self, my_snake:SnakeState, other_snakes:list[SnakeState], food_set:set[Point], is_constrictor:bool, width:int, height:int, enemy_can_grow_cache:dict[Any, bool]|None=None) -> AttackMap:
-    self, my_snake, other_snakes, food_set, is_constrictor, width, height
+    """Map cells enemies can contest next turn to their effective length."""
  ):
    occupied = self._occupied_cells(my_snake["body"], other_snakes)
-    my_id = my_snake["id"]
+    my_body_points = {(segment["x"], segment["y"]) for segment in my_snake["body"]}
    attack_map = {}
    for enemy in other_snakes:
      enemy_len = enemy.get("length", len(enemy["body"]))
      enemy_tail = (enemy["body"][-1]["x"], enemy["body"][-1]["y"])
      enemy_tail_stacked = self._is_tail_stacked(enemy["body"])
      snake_id = enemy.get("id")
      enemy_can_grow = (
        enemy_can_grow_cache.get(snake_id)
        if enemy_can_grow_cache and snake_id is not None
        else self._enemy_can_grow_this_turn(enemy, food_set)
      )
-      for pos in self.get_possible_moves(enemy["head"]).values():
+      enemy_head = enemy["head"]
-        point = (pos["x"], pos["y"])
+      for dx, dy in self.DIRECTIONS.values():
        point = (enemy_head["x"] + dx, enemy_head["y"] + dy)
        if not self._in_bounds(point, width, height):
          continue
@@ -664,18 +756,14 @@ class BestBattleSnake(TemplateSnake):
          not is_constrictor
          and point == enemy_tail
          and not enemy_tail_stacked
-          and not self._enemy_can_grow_this_turn(enemy, food_set)
+          and not enemy_can_grow
        )
        if point in occupied and not can_step_on_enemy_tail:
          continue
        # Do not consider impossible overlap directly into my own occupied body except head swap possibilities.
-        if point in {
+        if point in my_body_points:
          (segment["x"], segment["y"])
          for segment in my_snake["body"]
          if my_snake["id"] == my_id
        }:
          continue
        previous = attack_map.get(point)
@@ -684,7 +772,8 @@ class BestBattleSnake(TemplateSnake):
    return attack_map
-  def _future_body(self, current_body, next_head, ate_food, is_constrictor):
+  def _future_body(self, current_body:list[Coord], next_head:Coord, ate_food:bool, is_constrictor:bool) -> list[Coord]:
    """Simulate future body segments after a candidate move."""
    next_body = [next_head]
    next_body.extend(current_body)
@@ -694,9 +783,8 @@ class BestBattleSnake(TemplateSnake):
    next_body.pop()
    return next_body
-  def _can_step_on_own_tail(
+  def _can_step_on_own_tail(self, point:Point, own_tail:Point, own_tail_is_stacked:bool, ate_food:bool, is_constrictor:bool) -> bool:
-    self, point, own_tail, own_tail_is_stacked, ate_food, is_constrictor
+    """Return whether stepping onto our tail is allowed this turn."""
  ):
    if is_constrictor:
      return False
    if ate_food:
@@ -705,29 +793,60 @@ class BestBattleSnake(TemplateSnake):
      return False
    return point == own_tail
-  def _is_tail_stacked(self, body):
+  def _is_tail_stacked(self, body:list[Coord]) -> bool:
    """Check whether tail overlaps the previous body segment."""
    if len(body) < 2:
      return False
    return body[-1]["x"] == body[-2]["x"] and body[-1]["y"] == body[-2]["y"]
-  def _enemy_can_grow_this_turn(self, snake, food_set):
+  def _enemy_can_grow_this_turn(self, snake:SnakeState, food_set:set[Point]) -> bool:
    """Return True if an enemy can eat food in one move."""
    head = snake["head"]
    for dx, dy in self.DIRECTIONS.values():
      if (head["x"] + dx, head["y"] + dy) in food_set:
        return True
    return False
-  def _nearest_food_distance(self, start, foods, blocked, width, height):
+  def _hazard_damage_per_turn(self, game_data:dict) -> int:
-    if not foods:
+    """Read royale hazard damage from ruleset settings.
      return None
-    targets = {(food["x"], food["y"]) for food in foods}
+    Docs: https://docs.battlesnake.com/maps/royale
    """
    ruleset = {}
    if hasattr(game_data, "get_ruleset"):
      ruleset = game_data.get_ruleset() or {}
    elif hasattr(game_data, "ruleset"):
      ruleset = game_data.ruleset or {}
    settings = ruleset.get("settings", {}) if isinstance(ruleset, dict) else {}
    return int(settings.get("hazardDamagePerTurn", 15))
  def _hazard_is_active(self, point:Point, ate_food:bool, hazard_set:set[Point], previous_hazard_set:set[Point]) -> bool:
    """Apply royale hazard grace and food-exception behavior.
    Docs: https://docs.battlesnake.com/maps/royale
    """
    if point not in hazard_set:
      return False
    if ate_food:
      return False
    return point in previous_hazard_set
  def _time_exceeded(self, deadline:float|None) -> bool:
    """Return True when the move-calculation time budget is exhausted."""
    if deadline is None:
      return False
    return perf_counter() >= deadline
  def _nearest_food_distance(self, start:Point, food_set:set[Point], blocked:set[Point], width:int, height:int) -> int|None:
    """Compute shortest reachable distance to any food using BFS."""
    if not food_set:
      return None
    queue = deque([(start, 0)])
    seen = {start}
    while queue:
      point, distance = queue.popleft()
-      if point in targets:
+      if point in food_set:
        return distance
      for neighbor in self._neighbors(point):
@@ -735,14 +854,15 @@ class BestBattleSnake(TemplateSnake):
          continue
        if not self._in_bounds(neighbor, width, height):
          continue
-        if neighbor in blocked and neighbor not in targets:
+        if neighbor in blocked and neighbor not in food_set:
          continue
        seen.add(neighbor)
        queue.append((neighbor, distance + 1))
    return None
-  def _path_distance(self, start, goal, blocked, width, height):
+  def _path_distance( self, start:Point, goal:Point, blocked:set[Point], width:int, height:int) -> int|None:
    """Compute shortest path distance between two cells."""
    queue = deque([(start, 0)])
    seen = {start}
@@ -763,7 +883,8 @@ class BestBattleSnake(TemplateSnake):
    return None
-  def _flood_fill_count(self, start, blocked, width, height):
+  def _flood_fill_count(self, start:Point, blocked:set[Point], width:int, height:int) -> int:
    """Count reachable cells from `start` using flood fill."""
    queue = deque([start])
    seen = {start}
@@ -781,7 +902,8 @@ class BestBattleSnake(TemplateSnake):
    return len(seen)
-  def _open_neighbor_count(self, start, blocked, width, height):
+  def _open_neighbor_count(self, start:Point, blocked:set[Point], width:int, height:int) -> int:
    """Count walkable orthogonal neighbors around `start`."""
    count = 0
    for neighbor in self._neighbors(start):
      if not self._in_bounds(neighbor, width, height):
@@ -791,14 +913,15 @@ class BestBattleSnake(TemplateSnake):
      count += 1
    return count
-  def _next_turn_option_count(self, future_body, blocked, width, height):
+  def _next_turn_option_count(self, future_body:list[Coord], blocked:set[Point], width:int, height:int) -> int:
    """Estimate options available after the next simulated turn."""
    if not future_body:
      return 0
    next_head = future_body[0]
    count = 0
-    for pos in self.get_possible_moves(next_head).values():
+    for dx, dy in self.DIRECTIONS.values():
-      point = (pos["x"], pos["y"])
+      point = (next_head["x"] + dx, next_head["y"] + dy)
      if not self._in_bounds(point, width, height):
        continue
      if point in blocked:
@@ -806,7 +929,10 @@ class BestBattleSnake(TemplateSnake):
      count += 1
    return count
-  def _revisit_penalty(self, point):
+  def _revisit_penalty(self, point:Point) -> float:
    """Return penalty for revisiting recent head positions."""
    if not self.recent_heads:
      return 0.0
    penalty = 0.0
    for index, old_point in enumerate(reversed(self.recent_heads), start=1):
      if old_point != point:
@@ -814,7 +940,8 @@ class BestBattleSnake(TemplateSnake):
      penalty += max(0.0, 18.0 - index * 2.0)
    return penalty
-  def _territory_control_score(self, my_start, enemy_starts, blocked, width, height):
+  def _territory_control_score(self, my_start:Point, enemy_starts:list[Point], blocked:set[Point], width:int, height:int) -> int:
    """Estimate territorial advantage versus enemy start positions."""
    if not enemy_starts:
      return 0
@@ -849,7 +976,8 @@ class BestBattleSnake(TemplateSnake):
    return score
-  def _distance_map(self, start, blocked, width, height):
+  def _distance_map(self, start:Point, blocked:set[Point], width:int, height:int) -> dict[Point, int]:
    """Build a BFS distance map from the given start cell."""
    queue = deque([(start, 0)])
    distances = {start: 0}
@@ -867,19 +995,60 @@ class BestBattleSnake(TemplateSnake):
    return distances
-  def _neighbors(self, point):
+  def _enemy_confinement_metrics(self, enemy_head:Point, blocked:set[Point], width:int, height:int) -> tuple[int, int]:
    """Return enemy reachable space and immediate exit count."""
    enemy_blocked = set(blocked)
    enemy_blocked.discard(enemy_head)
    enemy_space = self._flood_fill_count(enemy_head, enemy_blocked, width, height)
    enemy_options = self._open_neighbor_count(
      enemy_head, enemy_blocked, width, height
    )
    return enemy_space, enemy_options
  def _enemy_constrictor_projection(self, other_snakes:list[SnakeState], blocked:set[Point], width:int, height: int) -> tuple[int, int]:
    """Estimate enemy best-space and total options after our candidate move."""
    best_enemy_space = 0
    total_enemy_options = 0
    for enemy in other_snakes:
      enemy_head = (enemy["head"]["x"], enemy["head"]["y"])
      enemy_best_for_snake = 0
      for neighbor in self._neighbors(enemy_head):
        if not self._in_bounds(neighbor, width, height):
          continue
        if neighbor in blocked:
          continue
        total_enemy_options += 1
        enemy_blocked = set(blocked)
        enemy_blocked.add(neighbor)
        enemy_space = self._flood_fill_count(
          neighbor, enemy_blocked, width, height
        )
        enemy_best_for_snake = max(enemy_best_for_snake, enemy_space)
      best_enemy_space = max(best_enemy_space, enemy_best_for_snake)
    return best_enemy_space, total_enemy_options
  def _neighbors(self, point:Point) -> Iterator[Point]:
    """Yield orthogonal neighbor coordinates for a point."""
    for dx, dy in self.DIRECTIONS.values():
      yield (point[0] + dx, point[1] + dy)
-  def _manhattan(self, a, b):
+  def _manhattan(self, a:Point, b:Point) -> int:
    """Return Manhattan distance between two points."""
    return abs(a[0] - b[0]) + abs(a[1] - b[1])
-  def _in_bounds(self, point, width, height):
+  def _in_bounds(self, point:Point, width:int, height:int) -> bool:
    """Return True when a point is inside board boundaries."""
    return 0 <= point[0] < width and 0 <= point[1] < height
-  def _fallback_move(self, head, width, height):
+  def _fallback_move(self, head:Coord, width:int, height:int) -> str:
-    for move, pos in self.get_possible_moves(head).items():
+    """Pick the first in-bounds move as emergency fallback."""
-      point = (pos["x"], pos["y"])
+    for move, (dx, dy) in self.DIRECTIONS.items():
      point = (head["x"] + dx, head["y"] + dy)
      if self._in_bounds(point, width, height):
        return move
    return "up"
@@ -3,9 +3,12 @@ from server.GameBoard import GameBoard
 from collections import deque
 class BetterMasterSnake(TemplateSnake):
  VERSION = "1.3.0"
  def __init__(self):
    super().__init__()
    self.name = "BetterMasterSnake"
    self.version = self.VERSION
    # Definiere die möglichen Bewegungsrichtungen
    self.min_safe_area = 2
@@ -3,6 +3,8 @@ from snakes.TemplateSnake import TemplateSnake
 import random
 class DummSnake(TemplateSnake):
  VERSION = "1.0.0"
  def choose_move(self, data: dict) -> str:
    is_move_safe = {"up": True, "down": True, "left": True, "right": True}
@@ -4,6 +4,8 @@ import random
 from scipy import spatial
 class LogicSnake(TemplateSnake):
  VERSION = "1.1.0"
  def avoid_my_body(self, my_body, possible_moves: dict) -> list:
    """
    my_body: List of dictionaries of x/y coordinates for every segment of a Battlesnake.
@@ -1,9 +1,12 @@
 from snakes.TemplateSnake import TemplateSnake
 class MasterSnake(TemplateSnake):
  VERSION = "1.2.0"
  def __init__(self):
    super().__init__()
    self.name = "MasterSnake"
    self.version = self.VERSION
    self.disabled_find_near_by_food = True
  def is_food_nearby(self, head, food_positions):
@@ -2,9 +2,13 @@ from server.GameBoard import GameBoard
 import random
 class TemplateSnake:
  VERSION = "1.0.0"
  def __init__(self):
    self.history = []
    self.target_food = None
    self.name = self.__class__.__name__
    self.version = getattr(self, "VERSION", "1.0.0")
  def clear_history(self):
    self.history = []
@@ -0,0 +1,33 @@
 import importlib
 SNAKE_REGISTRY = {
  "TemplateSnake": "1.0.0",
  "DummSnake": "1.0.0",
  "LogicSnake": "1.1.0",
  "MasterSnake": "1.2.0",
  "BetterMasterSnake": "1.3.0",
  "BestBattleSnake": "2.6.0",
 }
 def build_snake(selected_snake: str):
  if selected_snake not in SNAKE_REGISTRY:
    raise ValueError(f"Unknown snake: {selected_snake}")
  snake_module = importlib.import_module(f"snakes.{selected_snake}")
  snake_class = getattr(snake_module, selected_snake)
  return snake_class()
 def get_snake_version(selected_snake: str) -> str | None:
  version = SNAKE_REGISTRY.get(selected_snake)
  if version is None:
    return None
  return str(version)
 class SnakeBuilder:
  @classmethod
  def build(self, selected_snake: str):
    return build_snake(selected_snake)
  @classmethod
  def get_version(self, selected_snake: str) -> str | None:
    return get_snake_version(selected_snake)
@@ -0,0 +1,109 @@
 #!/usr/bin/env python3
 import argparse
 import time
 from server.GameBoard import GameBoard
 from snakes.BestBattleSnake import BestBattleSnake
 def build_game_state() -> dict:
  return {
    "game": {
      "id": "bench-best-snake",
      "ruleset": {
        "name": "standard",
        "version": "v1.0.0",
        "settings": {"hazardDamagePerTurn": 14},
      },
      "source": "custom",
      "map": "standard",
    },
    "turn": 42,
    "board": {
      "height": 11,
      "width": 11,
      "food": [{"x": 1, "y": 9}, {"x": 9, "y": 1}],
      "hazards": [],
      "snakes": [
        {
          "id": "me",
          "name": "me",
          "health": 74,
          "length": 8,
          "head": {"x": 5, "y": 5},
          "body": [
            {"x": 5, "y": 5},
            {"x": 5, "y": 4},
            {"x": 5, "y": 3},
            {"x": 4, "y": 3},
            {"x": 3, "y": 3},
            {"x": 3, "y": 4},
            {"x": 3, "y": 5},
            {"x": 4, "y": 5},
          ],
        },
        {
          "id": "enemy",
          "name": "enemy",
          "health": 70,
          "length": 8,
          "head": {"x": 7, "y": 7},
          "body": [
            {"x": 7, "y": 7},
            {"x": 7, "y": 6},
            {"x": 7, "y": 5},
            {"x": 8, "y": 5},
            {"x": 9, "y": 5},
            {"x": 9, "y": 6},
            {"x": 9, "y": 7},
            {"x": 8, "y": 7},
          ],
        },
      ],
    },
    "you": {
      "id": "me",
      "name": "me",
      "health": 74,
      "length": 8,
      "head": {"x": 5, "y": 5},
      "body": [
        {"x": 5, "y": 5},
        {"x": 5, "y": 4},
        {"x": 5, "y": 3},
        {"x": 4, "y": 3},
        {"x": 3, "y": 3},
        {"x": 3, "y": 4},
        {"x": 3, "y": 5},
        {"x": 4, "y": 5},
      ],
    },
  }
 def main() -> None:
  parser = argparse.ArgumentParser()
  parser.add_argument("--iterations", type=int, default=1000)
  args = parser.parse_args()
  game_state = build_game_state()
  board = GameBoard(
    game_id=game_state["game"]["id"],
    width=game_state["board"]["width"],
    height=game_state["board"]["height"],
    ruleset=game_state["game"]["ruleset"],
    source=game_state["game"]["source"],
    map=game_state["game"]["map"],
    snake_class=BestBattleSnake(),
  )
  start = time.perf_counter()
  for i in range(args.iterations):
    game_state["turn"] = i + 1
    board.read_game_data(game_state)
    board.snake_neat_make_a_move()
  elapsed = time.perf_counter() - start
  avg_ms = (elapsed / max(1, args.iterations)) * 1000.0
  print(f"BestBattleSnake benchmark: {args.iterations} moves in {elapsed:.4f}s ({avg_ms:.3f} ms/move)")
 if __name__ == "__main__":
  main()
@@ -218,6 +218,146 @@ class TestBestBattleSnake(unittest.TestCase):
    move = make_board(game_state).snake_neat_make_a_move()
    self.assertNotEqual(move, "right")
  def test_duel_small_length_lead_does_not_head_hunt(self):
    game_state = {
      "game": {
        "id": "test-duel-small-no-head-hunt",
        "ruleset": {"name": "standard", "version": "v1.0.0"},
        "source": "custom",
        "map": "standard",
      },
      "turn": 20,
      "board": {
        "height": 11,
        "width": 11,
        "food": [{"x": 1, "y": 1}],
        "hazards": [],
        "snakes": [
          {
            "id": "me",
            "name": "me",
            "health": 90,
            "length": 7,
            "head": {"x": 5, "y": 5},
            "body": [
              {"x": 5, "y": 5},
              {"x": 5, "y": 4},
              {"x": 5, "y": 3},
              {"x": 4, "y": 3},
              {"x": 4, "y": 4},
              {"x": 4, "y": 5},
              {"x": 4, "y": 6},
            ],
          },
          {
            "id": "enemy",
            "name": "enemy",
            "health": 90,
            "length": 6,
            "head": {"x": 7, "y": 5},
            "body": [
              {"x": 7, "y": 5},
              {"x": 7, "y": 4},
              {"x": 7, "y": 3},
              {"x": 7, "y": 2},
              {"x": 7, "y": 1},
              {"x": 6, "y": 1},
            ],
          },
        ],
      },
      "you": {
        "id": "me",
        "name": "me",
        "health": 90,
        "length": 7,
        "head": {"x": 5, "y": 5},
        "body": [
          {"x": 5, "y": 5},
          {"x": 5, "y": 4},
          {"x": 5, "y": 3},
          {"x": 4, "y": 3},
          {"x": 4, "y": 4},
          {"x": 4, "y": 5},
          {"x": 4, "y": 6},
        ],
      },
    }
    move = make_board(game_state).snake_neat_make_a_move()
    self.assertNotEqual(move, "right")
  def test_duel_big_length_lead_can_head_hunt(self):
    game_state = {
      "game": {
        "id": "test-duel-big-head-hunt",
        "ruleset": {"name": "standard", "version": "v1.0.0"},
        "source": "custom",
        "map": "standard",
      },
      "turn": 20,
      "board": {
        "height": 11,
        "width": 11,
        "food": [{"x": 1, "y": 1}],
        "hazards": [],
        "snakes": [
          {
            "id": "me",
            "name": "me",
            "health": 90,
            "length": 8,
            "head": {"x": 5, "y": 5},
            "body": [
              {"x": 5, "y": 5},
              {"x": 5, "y": 4},
              {"x": 5, "y": 3},
              {"x": 4, "y": 3},
              {"x": 4, "y": 4},
              {"x": 4, "y": 5},
              {"x": 4, "y": 6},
              {"x": 5, "y": 6},
            ],
          },
          {
            "id": "enemy",
            "name": "enemy",
            "health": 90,
            "length": 6,
            "head": {"x": 7, "y": 5},
            "body": [
              {"x": 7, "y": 5},
              {"x": 7, "y": 4},
              {"x": 7, "y": 3},
              {"x": 7, "y": 2},
              {"x": 7, "y": 1},
              {"x": 6, "y": 1},
            ],
          },
        ],
      },
      "you": {
        "id": "me",
        "name": "me",
        "health": 90,
        "length": 8,
        "head": {"x": 5, "y": 5},
        "body": [
          {"x": 5, "y": 5},
          {"x": 5, "y": 4},
          {"x": 5, "y": 3},
          {"x": 4, "y": 3},
          {"x": 4, "y": 4},
          {"x": 4, "y": 5},
          {"x": 4, "y": 6},
          {"x": 5, "y": 6},
        ],
      },
    }
    move = make_board(game_state).snake_neat_make_a_move()
    self.assertEqual(move, "right")
  def test_does_not_step_into_stacked_tail(self):
    game_state = {
      "game": {
@@ -328,6 +468,84 @@ class TestBestBattleSnake(unittest.TestCase):
    move = make_board(game_state).snake_neat_make_a_move()
    self.assertNotEqual(move, "up")
  def test_royale_uses_ruleset_hazard_damage_setting(self):
    game_state = {
      "game": {
        "id": "test-royale-hazard-setting",
        "ruleset": {
          "name": "standard",
          "version": "v1.0.0",
          "settings": {"hazardDamagePerTurn": 22},
        },
        "source": "custom",
        "map": "royale",
      },
      "turn": 5,
      "board": {
        "height": 11,
        "width": 11,
        "food": [],
        "hazards": [],
        "snakes": [
          {
            "id": "me",
            "name": "me",
            "health": 80,
            "length": 3,
            "head": {"x": 5, "y": 5},
            "body": [
              {"x": 5, "y": 5},
              {"x": 5, "y": 4},
              {"x": 5, "y": 3},
            ],
          }
        ],
      },
      "you": {
        "id": "me",
        "name": "me",
        "health": 80,
        "length": 3,
        "head": {"x": 5, "y": 5},
        "body": [
          {"x": 5, "y": 5},
          {"x": 5, "y": 4},
          {"x": 5, "y": 3},
        ],
      },
    }
    board = make_board(game_state)
    snake = board.snake_class
    self.assertEqual(snake._hazard_damage_per_turn(board), 22)
  def test_royale_new_hazard_has_spawn_grace(self):
    snake = BestBattleSnake()
    point = (4, 4)
    hazard_set = {point}
    self.assertFalse(
      snake._hazard_is_active(
        point, ate_food=False, hazard_set=hazard_set, previous_hazard_set=set()
      )
    )
    self.assertTrue(
      snake._hazard_is_active(
        point,
        ate_food=False,
        hazard_set=hazard_set,
        previous_hazard_set=hazard_set,
      )
    )
    self.assertFalse(
      snake._hazard_is_active(
        point,
        ate_food=True,
        hazard_set=hazard_set,
        previous_hazard_set=hazard_set,
      )
    )
  def test_constrictor_avoids_growth_dead_end(self):
    game_state = {
      "game": {
@@ -393,6 +611,145 @@ class TestBestBattleSnake(unittest.TestCase):
    move = make_board(game_state).snake_neat_make_a_move()
    self.assertEqual(move, "up")
  def test_duel_tightens_space_when_enemy_is_encased(self):
    game_state = {
      "game": {
        "id": "test-encase-tighten",
        "ruleset": {"name": "standard", "version": "v1.0.0"},
        "source": "custom",
        "map": "standard",
      },
      "turn": 40,
      "board": {
        "height": 7,
        "width": 7,
        "food": [{"x": 0, "y": 0}],
        "hazards": [],
        "snakes": [
          {
            "id": "me",
            "name": "me",
            "health": 92,
            "length": 8,
            "head": {"x": 2, "y": 3},
            "body": [
              {"x": 2, "y": 3},
              {"x": 2, "y": 2},
              {"x": 1, "y": 2},
              {"x": 1, "y": 3},
              {"x": 1, "y": 4},
              {"x": 2, "y": 4},
              {"x": 3, "y": 4},
              {"x": 3, "y": 5},
            ],
          },
          {
            "id": "enemy",
            "name": "enemy",
            "health": 88,
            "length": 5,
            "head": {"x": 4, "y": 3},
            "body": [
              {"x": 4, "y": 3},
              {"x": 5, "y": 3},
              {"x": 5, "y": 2},
              {"x": 4, "y": 2},
              {"x": 4, "y": 1},
            ],
          },
        ],
      },
      "you": {
        "id": "me",
        "name": "me",
        "health": 92,
        "length": 8,
        "head": {"x": 2, "y": 3},
        "body": [
          {"x": 2, "y": 3},
          {"x": 2, "y": 2},
          {"x": 1, "y": 2},
          {"x": 1, "y": 3},
          {"x": 1, "y": 4},
          {"x": 2, "y": 4},
          {"x": 3, "y": 4},
          {"x": 3, "y": 5},
        ],
      },
    }
    move = make_board(game_state).snake_neat_make_a_move()
    self.assertEqual(move, "right")
  def test_constrictor_prefers_choke_when_safe(self):
    game_state = {
      "game": {
        "id": "test-constrictor-choke",
        "ruleset": {"name": "constrictor", "version": "v1.0.0"},
        "source": "custom",
        "map": "standard",
      },
      "turn": 25,
      "board": {
        "height": 7,
        "width": 7,
        "food": [],
        "hazards": [],
        "snakes": [
          {
            "id": "me",
            "name": "me",
            "health": 100,
            "length": 7,
            "head": {"x": 2, "y": 3},
            "body": [
              {"x": 2, "y": 3},
              {"x": 2, "y": 2},
              {"x": 1, "y": 2},
              {"x": 1, "y": 3},
              {"x": 1, "y": 4},
              {"x": 2, "y": 4},
              {"x": 2, "y": 5},
            ],
          },
          {
            "id": "enemy",
            "name": "enemy",
            "health": 100,
            "length": 7,
            "head": {"x": 4, "y": 3},
            "body": [
              {"x": 4, "y": 3},
              {"x": 5, "y": 3},
              {"x": 5, "y": 2},
              {"x": 4, "y": 2},
              {"x": 4, "y": 1},
              {"x": 5, "y": 1},
              {"x": 6, "y": 1},
            ],
          },
        ],
      },
      "you": {
        "id": "me",
        "name": "me",
        "health": 100,
        "length": 7,
        "head": {"x": 2, "y": 3},
        "body": [
          {"x": 2, "y": 3},
          {"x": 2, "y": 2},
          {"x": 1, "y": 2},
          {"x": 1, "y": 3},
          {"x": 1, "y": 4},
          {"x": 2, "y": 4},
          {"x": 2, "y": 5},
        ],
      },
    }
    move = make_board(game_state).snake_neat_make_a_move()
    self.assertEqual(move, "right")
 if __name__ == "__main__":
  unittest.main()
@@ -11,6 +11,12 @@ wheels = [
    { url = "https://files.pythonhosted.org/packages/bc/8a/340a1555ae33d7354dbca4faa54948d76d89a27ceef032c8c3bc661d003e/aiofiles-25.1.0-py3-none-any.whl", hash = "sha256:abe311e527c862958650f9438e859c1fa7568a141b22abcd015e120e86a85695", size = 14668, upload-time = "2025-10-09T20:51:03.174Z" },
 ]
 [[package]]
 name = "aiologger"
 version = "0.7.0"
 source = { registry = "https://pypi.org/simple" }
 sdist = { url = "https://files.pythonhosted.org/packages/76/a8/ca4c00b319b877d29aa792cdd4ae3fb2a9f57268d94708a637abe9ae58c5/aiologger-0.7.0.tar.gz", hash = "sha256:7a4d5c91b836b61e842a791071786a3d80d6b6fa46fb8fd8e73391253ecb72ac", size = 20485, upload-time = "2022-10-05T01:03:22.199Z" }
 [[package]]
 name = "blinker"
 version = "1.9.0"
@@ -265,6 +271,7 @@ name = "snake-python"
 version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
    { name = "aiologger" },
    { name = "dotenv" },
    { name = "gel" },
    { name = "quart" },
@@ -272,6 +279,7 @@ dependencies = [
 [package.metadata]
 requires-dist = [
    { name = "aiologger", specifier = ">=0.7.0" },
    { name = "dotenv", specifier = ">=0.9.9" },
    { name = "gel", specifier = ">=3.1.0" },
    { name = "quart", specifier = ">=0.20.0" },
Author	SHA1	Message	Date
daniel156161	8f938ce3fe	Update BestBattleSnake Version to 2.6.0 Build and Push Docker Container / build-and-push (push) Failing after 23s Details	2026-04-03 21:40:31 +02:00
daniel156161	dfcdbae85b	add better enemy constrictor projection	2026-04-03 21:39:08 +02:00
daniel156161	fb579e5fbc	add customisable timeout buffer with env variable	2026-04-03 21:23:18 +02:00
daniel156161	8f6bc3cfdd	add timeout budget when exeaded use quick save move before timeout	2026-04-03 21:17:08 +02:00
daniel156161	f124ce6f96	head hunt only when my snake is bigger and into dual mode	2026-04-03 20:57:33 +02:00
daniel156161	6ab0161b49	add types to function args	2026-04-03 20:44:03 +02:00
daniel156161	d7bd89eae9	add python doc strings	2026-04-03 20:21:12 +02:00
daniel156161	eace1872d7	move snake builder into __init__ of snakes file and use it into server class	2026-04-03 20:11:46 +02:00
daniel156161	0a3db6ba57	add versions to snakes and read it in server class	2026-04-03 19:57:55 +02:00
daniel156161	013ac98821	implement royale game mode and tighten spaces in duel mode	2026-04-03 19:26:56 +02:00
daniel156161	a3fe386198	use battlsnake cli from git repo and build client localy	2026-04-03 18:37:16 +02:00
daniel156161	8a431da014	add local client as submodule	2026-04-03 18:31:11 +02:00
daniel156161	19e4aee454	rework logging and add metrics and prometheus metrics	2026-04-03 18:26:31 +02:00
daniel156161	c8dd01490c	add aiologger package	2026-04-03 18:01:38 +02:00
daniel156161	1e57ad1af6	add bootstrap script to start the server up the same way	2026-04-03 18:01:18 +02:00
daniel156161	4ca905fbf0	add quart common submodule	2026-04-03 17:38:52 +02:00
daniel156161	8e733dfe39	add script to analyse dataset	2026-04-03 15:45:54 +02:00
daniel156161	49f2e0b008	add more flags and allow to read more input file then one	2026-04-03 15:44:19 +02:00
daniel156161	37de34cc5e	update to store and curate data correctly	2026-04-03 15:43:19 +02:00