Metadata-Version: 2.5
Name: eslams-core
Version: 0.6.2
Summary: Public eSlams framework for AI game agents, deterministic runs, artifacts, and replays.
Project-URL: Homepage, https://github.com/ElectronicSlams/eSlams
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Author: ElectronicSlams
License: MIT License
        
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License-File: LICENSE
Keywords: agents,ai,evals,games,leaderboards,replays
Classifier: Development Status :: 3 - Alpha
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Topic :: Scientific/Engineering :: Artificial Intelligence
Requires-Python: >=3.10
Requires-Dist: cryptography<51,>=50.0.2
Requires-Dist: fastapi<1,>=0.142.4
Requires-Dist: httpx<1,>=0.28.1
Requires-Dist: python-chess<2,>=1.999
Requires-Dist: starlette<2,>=1.7.0
Requires-Dist: uvicorn[standard]<1,>=0.54.0
Provides-Extra: dev
Requires-Dist: build<2,>=1.6.1; extra == 'dev'
Requires-Dist: jsonschema<5,>=4.23; extra == 'dev'
Requires-Dist: mypy<1.20,>=1.10; extra == 'dev'
Requires-Dist: pytest-cov<7,>=5; extra == 'dev'
Requires-Dist: pytest<10,>=9.1.1; extra == 'dev'
Requires-Dist: ruff<1,>=0.6; extra == 'dev'
Requires-Dist: setuptools<84,>=83; extra == 'dev'
Requires-Dist: twine<8,>=7; extra == 'dev'
Description-Content-Type: text/markdown

# eSlams Core

Open infrastructure for evaluating AI agents in games.

eSlams Core gives model builders, agent developers, researchers, and tournament
operators a shared way to run games, record what happened, replay it, validate
it, and submit proof artifacts to the hosted eSlams platform.

Core is the public evaluation engine behind the developer loop:

- 50 supported game and control arenas
- a strict `/act` protocol for HTTP agents
- direct model-backed agents for major LLM providers
- a provider capability registry for safe model parameter handling
- deterministic traces, scores, replays, and `.eslams` proof packages
- local validation before upload

Official leaderboard runs on eslams.com use server-controlled infrastructure,
secret seeds, private scenario sets, and hidden eval variants so agents cannot
overfit to the public package. Core supports the full public 50-game
catalogue listed below.

## Contents

- [Local lab quickstart](docs/LABS.md)
- [Docs index](docs/DOCS_INDEX.md)

- [Install](#install)
- [Quick Start](#quick-start)
- [Run Model Agents](#run-model-agents)
- [Build an HTTP Agent](#build-an-http-agent)
- [What a Run Produces](#what-a-run-produces)
- [Platform Contracts](#platform-contracts)
- [Arena Session Transport](#arena-session-transport)
- [Sample Runs](#sample-runs)
- [Upload to eslams.com](#upload-to-eslamscom)
- [Full Arena Catalogue](#full-arena-catalogue)
- [Provider Support](#provider-support)
- [Release v0.6.2](#release-v062)
- [Release v0.6.1](#release-v061)
- [Release v0.6.0](#release-v060)
- [Release v0.5.1](#release-v051)
- [Release v0.5.0](#release-v050)
- [Release v0.4.0](#release-v040)
- [Release v0.3.2](#release-v032)
- [Release v0.3.1](#release-v031)
- [Release v0.3.0](#release-v030)
- [Contribute](#contribute)
- [Support eSlams](#support-eslams)

## Why eSlams Exists

Most model game demos are hard to trust. They mix prompts, rules, legality,
scoring, UI, hidden state, and model output in ways that are difficult to audit.
eSlams separates those concerns.

An eSlams run has a few hard rules:

- The arena owns the rules.
- The agent sees only its allowed observation and legal action set.
- The runner records every request, response, fallback, error, and transition.
- The artifact contains enough public data to replay the match.
- The auditor trace contains enough canonical state to validate the match.
- The manifest hashes the files so tampering is visible.
- Official scoring happens only through controlled eSlams infrastructure.

The result is a game evaluation stack that can be run locally, inspected by a
human, validated by a machine, and uploaded as a portable proof package.

## Install

On Linux/macOS (including systems with an externally managed Python):

```bash
python3 -m venv .venv
. .venv/bin/activate
python -m pip install eslams-core
```

On Windows PowerShell:

```powershell
py -3 -m venv .venv
.venv\Scripts\python.exe -m pip install eslams-core
.venv\Scripts\eslams.exe --version
```

For local development:

```bash
git clone https://github.com/ElectronicSlams/eSlams.git
cd eSlams
python3 -m venv .venv
. .venv/bin/activate
python -m pip install -e ".[dev]"
```

Core 0.6.2 requires Python 3.10+ and tests Python 3.10 through 3.12.
Published Core 0.6.1 retains its historical Python 3.9 support. The value-free `.env.example` documents
configuration names; Core does not load `.env` automatically. Export selected
settings explicitly and keep secrets in ignored local files or service
configuration. Cross-platform development commands are in [CONTRIBUTING](https://github.com/ElectronicSlams/eSlams/blob/main/CONTRIBUTING.md).

Source archives exported from commits containing this change preserve their
commit identity using Git archive substitution. Earlier tag archives retain
their historical packaging limitation: use the published PyPI sdist/wheel or a
Git checkout. A copied tree with neither Git nor embedded/exported provenance
still fails closed. Python distributions include PEP 561 `py.typed` markers.

### Third-party chess license

Core's own source is MIT-licensed. The required `python-chess` dependency
installs the `chess` library; both declare GPL-3.0-or-later in their
[PyPI metadata](https://pypi.org/project/chess/1.11.2/) and
[upstream documentation](https://python-chess.readthedocs.io/en/latest/#license).
Their licenses are separate from Core's MIT license. Downstream distributors
should include and review those third-party notices for their distribution.
The chess dependency remains required in this branch; it has not been silently
made optional or replaced.

## Quick Start

Create a workspace, run a match, validate the artifact, and render a replay:

```bash
eslams init
eslams run --arena connect-four --agent random --opponent first-legal
eslams validate runs/latest.eslams
eslams replay runs/latest.eslams
```

By default, `eslams run` writes:

- `runs/<run_id>.eslams`, a portable zip-compatible proof archive
- `runs/<run_id>.eslams.d`, an expanded inspection directory
- `runs/latest.eslams`, a pointer to the latest archive
- `runs/latest.eslams.d`, a pointer to the latest expanded copy

Use `--expanded` when you only want the expanded directory:

```bash
eslams run --arena chess --agent first-legal --opponent first-legal --expanded
```

After `--expanded`, validate or replay `runs/latest.eslams.d`. The archive
pointer is removed. Latest links use relative targets so they survive moving
or copying the runs directory. If symlink privileges are unavailable, Core
reports the completed artifact path and warns that latest links were not
updated. Use the returned `artifact` path in automation and concurrent runs.

## Run Model Agents

Pass `provider:model` to use a provider-backed model agent.

```bash
export OPENAI_API_KEY=...
export ANTHROPIC_API_KEY=...
export GEMINI_API_KEY=...
export OPENROUTER_API_KEY=...
export AWS_BEARER_TOKEN_BEDROCK=...

eslams run \
  --arena chess \
  --agent openai:gpt-5-mini \
  --opponent anthropic:claude-sonnet-4-6

eslams run \
  --arena connect-four \
  --agent gemini:gemini-flash-lite-latest \
  --opponent first-legal

eslams run \
  --arena tic-tac-toe \
  --agent openrouter:openai/gpt-5-mini \
  --openrouter-provider-order "Amazon Bedrock" \
  --opponent first-legal

# Split provider:model on the first colon; the Bedrock model's :0 is literal.
eslams run \
  --arena tic-tac-toe \
  --agent bedrock:amazon.nova-micro-v1:0 \
  --bedrock-region us-east-1 \
  --opponent first-legal
```

Provider receipts are written into the artifact without API keys. Core warns
before a run when a model is missing from the registry, unavailable from API,
not marked game-agent-supported, or missing its API key. See
[the provider guide](https://github.com/ElectronicSlams/eSlams/blob/main/docs/PROVIDERS.md) for the exact wire adapters, model
identity rules, reasoning behavior, usage semantics, and rate-card contract.

Use the verified provider workflow before spending on a run:

```bash
# Safe and offline: registry metadata only. This is not an availability claim.
eslams providers preflight \
  --provider openai --model gpt-5-mini --arena tic-tac-toe

# Account-aware: model discovery where supported, one minimal inference,
# legal-action parsing, and usage extraction.
eslams providers preflight \
  --provider openai --model gpt-5-mini --arena tic-tac-toe --live

eslams run \
  --arena tic-tac-toe \
  --agent openai:gpt-5-mini \
  --opponent first-legal \
  --execution-profile smoke
eslams validate runs/latest.eslams --profile runner-bundle
eslams replay runs/latest.eslams
```

Provider keys may include pasted leading/trailing whitespace; Core trims it.
Internal whitespace and non-ASCII credentials fail before a network call, with
a redacted `provider_auth_failed` diagnostic. A provider namespace in the
catalogue does not imply a Core inference adapter; preflight checks both.
Inline retry waits are limited to five seconds: larger provider hints or
configured backoffs abort with the failed receipt retained. Core does not retry
earlier than a provider's requested wait. Retry hint receipts are bounded at
24 hours for safe serialization. Official execution still disallows adapter
retries and leaves whole-case retries to its orchestrator.

`preflight_mode` is always `registry_only` or `live`, and every live check is
reported separately. A registry-only pass does not prove that a provider
account can invoke the model.

A completed diagnostic run exits 0 even if `summary.match_valid_for_scoring`
is false. For scoring automation, add `--require-scoring-valid`: it preserves
the diagnostic artifact and exits 1 on an invalid match. Input/execution errors
also exit nonzero. `--runner-result-json` continues to report validation status.

Table arenas require explicit agents for seats beyond player_2. For example:

```bash
eslams run --arena bridge --seat-agent player_3=first-legal --seat-agent player_4=random
```

Repeat `--seat-agent PLAYER=AGENT` for each seat; assignments override the
corresponding `--agent` / `--opponent` option. Unknown or duplicate seats fail.

The default failure policies are fail-closed (`invalid-match`). For model
comparison runs, keep them explicit in automation:

```bash
eslams run \
  --arena chess \
  --agent openai:gpt-5-mini \
  --opponent anthropic:claude-sonnet-4-6 \
  --on-agent-error invalid-match \
  --on-illegal-action invalid-match
```

For interactive demos, deterministic fallback is opt-in and permanently marks
the run invalid for scoring:

```bash
eslams run \
  --arena tic-tac-toe \
  --agent openai:gpt-5-mini \
  --opponent first-legal \
  --on-agent-error fallback \
  --on-illegal-action fallback
```

Failure policies:

| Policy | Effect |
| --- | --- |
| `fallback` | Use the arena's deterministic failure action, record `fallback_action`, and make the run unscoreable. |
| `invalid-match` | Stop and mark `match_valid_for_scoring=false`. |
| `forfeit` | End the match as a forfeit and mark `match_valid_for_scoring=false`. |

Execution profiles are `interactive`, `smoke`, and `official_eval`.
`official_eval` rejects fallback policies and provider-local retries; the
official orchestrator owns whole-case retries. Set `--case-attempt-index` on a
replayed case so physical attempt IDs stay idempotent and retry-scoped. Each run normally has a unique ID. Use `--run-id NAME` to select a fixed
artifact path; existing output is refused unless `--overwrite` is explicit.

Reasoning is controlled with `--reasoning disabled|enabled|auto`. Core sends
only model-supported controls. Anthropic manual thinking requires a budget of
at least 1,024 tokens and below `max_tokens`; Claude 4.7+ and Claude 5 use
adaptive thinking and omit incompatible temperature/manual-budget fields.

## Build an HTTP Agent

Agents implement a single endpoint:

```text
POST /act
```

The runner sends an `eslams-act-v1` request containing the current observation,
legal actions, public history according to the memory policy, and a time budget.
The agent returns one action. The arena validates legality.

Minimal Python agent:

```python
from eslams.agent import AgentServer

server = AgentServer(agent_id="sample-first-legal", version="1.0.0")


@server.act
def act(request):
    return {
        "action": request.legal_actions[0],
        "confidence": 1.0,
        "public_explanation": "Selected the first legal action.",
    }


server.run()
```

Test it locally:

```bash
eslams agent test --url http://localhost:8000/act --arena chess
```

Print a platform registration payload:

```bash
eslams agent publish \
  --name "My Chess Agent" \
  --url https://example.com/act
```

## What a Run Produces

Every Core run can produce:

- `manifest.json`
- public trace
- agent-visible trace
- private judge trace
- auditor trace with deterministic before/after state snapshots
- replay events
- public display frames
- local replay HTML
- score and metrics files
- model provider receipts
- runner logs
- agent I/O logs
- error logs
- environment metadata
- broadcast metadata placeholders
- optional runner signature

Score and manifest metadata include:

- `match_valid_for_scoring`
- `per_case_run_valid`
- `per_case_scoring_eligible`
- `proof_row_publication_eligible`
- `aggregate_leaderboard_eligible`
- `aggregate_ineligibility_reason`
- `invalid_reason`
- `agent_error_count_by_player`
- `illegal_action_count_by_player`
- `fallback_action_count_by_player`
- `provider_status_by_player`
- `provider_action_count_by_player`
- `logical_action_count_by_player`
- `integrity_status`, `invalid_reason_codes`, and action provenance
- `usage_complete`, `cost_complete`, and `attempt_ledger_complete`
- `model_identity_verified`
- aggregate usage/cost and per-seat/provider/model/attempt/status breakdowns

Provider status values are normalized as `provider_ok`,
`provider_receipt_missing`, `provider_usage_unavailable`, `local_agent`, or
`agent_error`.

Validate an artifact:

```bash
eslams validate runs/latest.eslams
```

Render a replay:

```bash
eslams replay runs/latest.eslams
```

The replay viewer includes split agent move lists, play/pause playback, public
state details, and chess-specific board coordinates, side-colored pieces, FEN,
winner, terminal reason, legal count, check/checkmate status, and score.

## Platform Contracts

Core exposes stable, no-secret contracts for Platform and runner/container
integrations. See [docs/PLATFORM_CONTRACTS.md](https://github.com/ElectronicSlams/eSlams/blob/main/docs/PLATFORM_CONTRACTS.md) for
schema export, validation profiles, public replay packages, provider receipts,
planning, resume checkpoints, runner health, catalogue exports, publication
bundles, and fixtures. See [CHANGELOG.md](https://github.com/ElectronicSlams/eSlams/blob/main/CHANGELOG.md) for the release summary
of contract and CLI changes.

Common integration commands:

```bash
eslams schemas export --out schemas/
eslams validate runs/latest.eslams --profile runner-bundle --summary-json
eslams artifact public-export runs/latest.eslams --out public_replay_package
eslams replay validate-public public_replay_package
eslams runner result --artifact runs/latest.eslams --artifact-uri URI --job-id JOB
eslams providers preflight --provider openai --model gpt-5-mini --arena tic-tac-toe
eslams plan battlefield --pairs openai:gpt-5-mini --arenas tic-tac-toe --json
eslams publish export --kind uploaded-replay --artifact runs/latest.eslams --out bundle
eslams publish validate bundle --json
eslams arena smoke --all --json
eslams core capabilities --game tic-tac-toe
eslams core budgets --json
eslams core golden --games tic-tac-toe,connect-four --out fixtures/core_golden.json
eslams bench arena-step --games tic-tac-toe,connect-four --iterations 100
```

The shipped public registry enables no models for Official evaluation.
`plan official --suite public-smoke` rejects an empty selection with an actionable
error. The Battlefield example above is a showcase plan and grants no Official authority.

Core v0.4.0 adds `core_step` / `eslams core step` for a pure deterministic
step contract with `coreContractVersion: "2.0"`, canonical hashes, compact
observations, generated action schemas, prompt packages, replay events,
deadline-aware errors, and per-stage timings. The repository contains
Platform-facing TypeScript source in `packages/core-contracts` and the gated
`packages/core-lite` runtime. These are excluded from the Python wheel and
are not published npm packages; integrate them from a pinned source checkout.
Core-lite's supported tic-tac-toe/connect-four deterministic state and step
fields are checked against Python fixtures in CI; see its
[supported scope](packages/core-lite/README.md).

## Arena Session Transport

Core v0.3.0 adds a lightweight server-to-server Arena transport for live
Platform play. It avoids artifact export, replay export, provider setup, and
runner-heavy startup. Platform owns auth, persistence, model calls, Durable
Objects, WebSockets, SSE, AI Gateway, and Cloudflare integrations.

Python API:

```python
from eslams.arena_transport import legal_actions_page, start_session, step_session

players = {
    "player_1": {"kind": "human", "label": "Human"},
    "player_2": {"kind": "model", "label": "AI"},
}

started = start_session("tic-tac-toe", "standard", 1, players)
stepped = step_session(started["session_state"], "player_1", "4")
page = legal_actions_page(started["session_state"], "player_1", query="center")
```

CLI API (set the same secret before Python calls too):

```bash
export ESLAMS_ARENA_SESSION_SECRET="$(python -c 'import secrets; print(secrets.token_hex(32))')"
eslams arena start \
  --game tic-tac-toe \
  --variant standard \
  --seed 1 \
  --players-json '{"player_1":{"kind":"human"},"player_2":{"kind":"model"}}'
```

Start and step responses include `public_state`, a canonical live
`display_frame`, active/next actor metadata, legal action tokens, polished
`legal_action_descriptors`, public-safe Arena events, strict state hash status,
paging metadata, and Core timing fields. `session_state` is a signed server-only
envelope, verified with `ESLAMS_ARENA_SESSION_SECRET`, and must still be
kept on the server. For the active human recipient, browser-streamable fields are `public_state`,
`display_frame`, `legal_action_descriptors`, `events`, actor metadata,
terminal/outcome fields, and timing.

Descriptor rows are available for every registered game and include stable
`token`, `label`, `short_label`, `verb`, `object`, `category`, `group`,
`sort_key`, `prompt_label`, `confirm`, and `disabled_reason` fields. Large
action sets can be paged or searched with `legal_actions_page`.

Arena event types include `session.started`, `human.action.accepted`,
`state.applied`, `model.action.requested`, `model.action.accepted`,
`turn.ready_for_human`, `match.completed`, and
`turn.failed`. `arena.auto_advanced` is reserved and is not emitted.
Human legal-action lists are recipient-specific and must be routed privately;
signed full-state envelopes stay on the trusted server. Public projections omit
prompts, raw responses, private observations, provider receipts, hidden eval
material, or private reasoning.

## Sample Runs

The [sample tree](sample_runs/README.md) contains keyless Local fixtures and
validated publication shapes, with [checksums and expected status](docs/SAMPLE_CLASSIFICATION.md).

- `model_battle_sample/sample_builtin_chess.eslams` is a completed built-in
  first-legal versus first-legal chess run; it is not a provider model battle.
- `model_eval_sample/local_eval_fixture.eslams` is an unsigned tic-tac-toe
  fixture exported with the `official-proof` bundle kind. Its rows establish
  no Official or Grand Slam trust.

The former `run_d48ff364a0b949df` model-battle claim did not match the tracked
file. Historical invalid/HMAC samples are replaced, rather than described as
current validated proofs. Producer commits and unchanged historical limitations
are explicit in [sample classification](docs/SAMPLE_CLASSIFICATION.md).

## Upload to eslams.com

A runner bundle is a private intake archive, not a public page. `runs/latest.eslams`
can include auditor traces and `logs/agent_io.jsonl` with plaintext hidden state.
Upload that archive only to a private intake path.

For a public replay page, export the public replay package and upload that
package instead:

```bash
eslams artifact public-export runs/latest.eslams --out public_replay_package
```

1. Run locally with Core.
2. Validate the artifact.
3. Open [eslams.com](https://eslams.com).
4. Use the Artifact Intake panel.
5. Upload `runs/latest.eslams` or a specific `run_<id>.eslams` archive for private intake, or upload `public_replay_package` when the page is public.
6. Open the generated replay, score, and artifact proof pages.

```bash
eslams run --arena connect-four --agent random --opponent first-legal
eslams validate runs/latest.eslams
```

The expanded `.eslams.d` directory is for local inspection. The `.eslams`
archive is the portable upload artifact.

## Full Arena Catalogue

Core supports all 50 arenas below. The variant label is the public Core ruleset
identifier used for local and artifact-backed runs; fidelity is explicit so
compact/lite arenas do not overclaim full game coverage.

| Arena | Public Core Variant | Fidelity |
| --- | --- | --- |
| `chess` | `standard` | faithful |
| `go` | `board_9x9` | faithful |
| `connect-four` | `standard` | faithful |
| `tic-tac-toe` | `standard` | faithful |
| `othello` | `standard` | faithful |
| `checkers` | `standard` | faithful |
| `shogi` | `standard` | faithful |
| `xiangqi` | `standard` | faithful |
| `gomoku` | `standard` | faithful |
| `hex` | `standard` | faithful |
| `mancala` | `standard` | faithful |
| `nine-mens-morris` | `standard` | compact |
| `pentago` | `standard` | faithful |
| `ultimate-tic-tac-toe` | `standard` | faithful |
| `battleship` | `standard` | compact |
| `blackjack` | `core_hit_stand_s17` | compact |
| `leduc-holdem` | `core_compact_leduc_fixed_menu` | compact |
| `limit-texas-holdem` | `core_compact_holdem_fixed_menu_limit` | compact |
| `no-limit-texas-holdem` | `core_compact_holdem_fixed_menu_no_limit` | compact |
| `shedding-card-game` | `core_rank_suit_shedding` | compact |
| `gin-rummy` | `core_compact_gin` | compact |
| `mahjong` | `core_compact_draw_discard` | compact |
| `dou-dizhu` | `core_landlord_shedding` | compact |
| `bridge` | `core_compact_bridge_play_phase` | compact |
| `hearts` | `core_penalty_tricks` | compact |
| `spades` | `core_trump_tricks` | compact |
| `euchre` | `core_call_and_play` | compact |
| `cribbage` | `core_discard_showdown` | compact |
| `crazy-eights` | `core_wild_eight_shedding` | compact |
| `hanabi` | `core_compact_hanabi` | compact |
| `prisoners-dilemma` | `core_one_shot_matrix` | faithful |
| `bargaining` | `core_bilateral_split` | compact |
| `negotiation` | `core_price_delivery_grid` | compact |
| `first-price-sealed-bid-auction` | `core_two_bidder_private_values` | faithful |
| `liars-dice` | `core_single_round` | compact |
| `goofspiel` | `core_five_card_goofspiel` | compact |
| `rock-paper-scissors` | `core_one_shot_hidden_commit` | faithful |
| `taxi` | `standard` | inspired-by |
| `frozen-lake` | `standard` | inspired-by |
| `cliff-walking` | `standard` | inspired-by |
| `cartpole` | `standard` | inspired-by |
| `mountain-car` | `standard` | inspired-by |
| `lunar-lander` | `lander-lite` | inspired-by |
| `car-racing` | `standard` | inspired-by |
| `bipedal-walker` | `standard` | inspired-by |
| `paddle-ball` | `standard` | inspired-by |
| `alien-shooter` | `standard` | inspired-by |
| `boxing-style-arena` | `standard` | inspired-by |
| `ice-hockey-style-arena` | `standard` | inspired-by |
| `backgammon` | `standard` | compact |

Paddle-ball 1.1.0 allows 400 actions so its ten-bounce target is reachable.
Ultimate Tic-Tac-Toe 1.1.0 draws when all local boards are decided without a
global line. Nine Men's Morris retains a compact 120-action episode draw rule;
its results can differ from standard games that continue from that position.
Catalogue help examples name the initial seed-1 position and contain real legal
tokens; query each current state's legal actions before playing them.

Auction 1.1.0 separates the item recipient (`allocation_winner`) from the match
winner by utility. The highest bid receives the item; tied bids alternate by seed
parity. Utility includes overbid losses, and score is `(utility + 10) / 20`.
Equal utilities draw. Negotiation 1.1.0 enforces both private reserve utilities;
below-reserve acceptance cannot produce a deal. Its price grid uses steps of ten,
which admits a mutually feasible deal for every generated reserve combination.

Alien-shooter 1.1.0 resolves hits after projectile motion and after alien descent.
Aliens descend once per twelve actions. A public-observation tracking policy can
clear all 1,225 possible initial formations within 28 actions, making the full
score attainable across the seeded layout support.

Backgammon 1.1.0 retains the compact five-checker game and 160-action episode
limit. Legal moves enforce maximum dice use, the larger-die rule when only one
number can be played, and bearing off an overshoot only from the farthest checker.
When the remaining roll is blocked, `pass` records a turn transition and the next
seat's fresh roll; each pass counts toward the episode limit. Both seats can pass
without producing an empty-action live state.
The move constraints follow the [USBGF playing rules](https://usbgf.org/backgammon-basics-how-to-play/).

List arenas from your installed copy:

```bash
eslams arenas
```

## Chess Observation Details

Chess is powered by `python-chess`. Observations include rule-derived context
without engine evaluation:

- FEN
- side to move and active player
- fullmove number and halfmove clock
- SAN history
- last move in UCI and SAN
- legal moves in UCI and SAN
- legal move flags for capture, check, checkmate, promotion, castling, and
  en-passant
- material table and material balance
- king status and legal evasions
- draw claim status
- terminal reason, winner, scores, and final validation

This gives language models enough chess context to make legal decisions without
smuggling in engine strength.

## Provider Support

Core has direct first-party HTTP adapters for all five provider routes below:

| Provider Argument | API Key Environment Variable |
| --- | --- |
| `openai:<model>` | `OPENAI_API_KEY` |
| `anthropic:<model>` | `ANTHROPIC_API_KEY` |
| `gemini:<model>` | `GEMINI_API_KEY` |
| `openrouter:<vendor/model>` | `OPENROUTER_API_KEY` |
| `bedrock:<model-id>` | `AWS_BEARER_TOKEN_BEDROCK` |

OpenAI uses the raw Responses `output[]` wire shape, Anthropic uses Messages,
Gemini uses `generateContent`, OpenRouter uses Chat Completions with native
`usage.cost`, and Bedrock uses Converse. OpenRouter provider fallback is
disabled and an optional provider order is sent as a pin. Bedrock model IDs
retain their literal version separator such as `:0`.

The model capability registry covers a broader provider landscape so Core can
track API availability, text-game support, endpoints, modalities, temperature
support, reasoning support, provider-controlled reasoning fields such as
OpenAI `reasoning_effort`, Gemini `thinkingBudget`/`thinkingLevel`, Anthropic
adaptive thinking, context windows, output limits, verification timestamps, and
source metadata.

Inspect supported game-agent models:

```bash
eslams models list --provider openai --game-agent-supported
eslams models list --provider gemini --game-agent-supported --json
```

From a source checkout, generate a separate registry snapshot for review:

```bash
eslams models update --providers openai,anthropic,google,openrouter,bedrock --output model-registry.snapshot.json
```

The updater requires a new `--output` file. A provider filter defines the snapshot
scope; it can produce a smaller inventory. Inspect it before deliberately replacing
checked-in data. It never changes the packaged registry implicitly, and a failed
source fetch does not produce a successful partial snapshot.

Provider organizations tracked by the registry:

The full CLI registry currently contains **8,762 model rows across 259 provider
namespaces**. The table below and generated inventory describe a **90-namespace
curated subset**, rather than the full CLI registry. The curated count is source-backed: 69 organizations were in the
original curated Core list, Cursor was added from the platform's API-discovered
Composer model row, and 20 additional author namespaces come from the
release-pinned OpenRouter text-model snapshot. A listing is a catalog identity,
not a claim that Core has a direct adapter or that a deployed account can call
the provider. See [the generated registry inventory](https://github.com/ElectronicSlams/eSlams/blob/main/docs/REGISTRY_AVAILABLE_MODELS.md)
for the per-model snapshot and verification boundary.

| Provider Key | Organization |
| --- | --- |
| `qwen` | Alibaba / Qwen |
| `anthropic` | Anthropic |
| `cursor` | Cursor |
| `deepseek` | DeepSeek |
| `google` | Google / DeepMind |
| `meta` | Meta AI |
| `openai` | OpenAI |
| `xai` | xAI |
| `01-ai` | 01.AI |
| `ant-group` | Ant Group |
| `baidu` | Baidu |
| `bytedance` | ByteDance / Seed |
| `huawei` | Huawei |
| `iflytek` | iFlytek |
| `kuaishou` | Kuaishou |
| `meituan` | Meituan |
| `minimax` | MiniMax |
| `openbmb` | OpenBMB / ModelBest |
| `sensetime` | SenseTime |
| `shanghai-ai-lab` | Shanghai AI Lab |
| `stepfun` | StepFun |
| `tencent` | Tencent |
| `xiaomi` | Xiaomi |
| `zhipu` | Zhipu AI / Z.ai |
| `adept-ai` | Adept AI |
| `ai21-labs` | AI21 Labs |
| `ai71` | AI71 |
| `aion-labs` | Aion Labs |
| `aleph-alpha` | Aleph Alpha |
| `ai2` | Allen Institute for AI, AI2 |
| `amazon-aws` | Amazon / AWS |
| `anthracite-org` | Anthracite Org |
| `apple` | Apple |
| `arcee-ai` | Arcee AI |
| `baai` | BAAI, Beijing Academy of AI |
| `baichuan-ai` | Baichuan AI |
| `bigcode` | BigCode / ServiceNow / Hugging Face |
| `bigscience` | BigScience / Hugging Face community |
| `character-ai` | Character.AI |
| `cognitivecomputations` | Cognitive Computations |
| `cohere` | Cohere |
| `contextual-ai` | Contextual AI |
| `core42` | Core42 / Inception / G42 |
| `databricks-mosaicml` | Databricks / MosaicML |
| `deepcogito` | DeepCogito |
| `eleutherai` | EleutherAI |
| `essential-ai` | Essential AI |
| `gryphe` | Gryphe |
| `ibm` | IBM |
| `ibm-granite` | IBM Granite |
| `inclusionai` | InclusionAI |
| `inflection-ai` | Inflection AI |
| `kakao` | Kakao |
| `krutrim` | Krutrim |
| `kwaipilot` | KwaiPilot |
| `lg` | LG AI Research |
| `lighton` | LightOn |
| `liquid-ai` | Liquid AI |
| `mancer` | Mancer |
| `microsoft` | Microsoft |
| `mistral-ai` | Mistral AI |
| `moonshot-ai` | Moonshot AI |
| `morph` | Morph |
| `naver` | Naver |
| `nex-agi` | Nex AGI |
| `nous-research` | Nous Research |
| `nvidia` | NVIDIA |
| `openrouter` | OpenRouter |
| `perceptron` | Perceptron |
| `perplexity` | Perplexity |
| `poolside` | Poolside |
| `reka-ai` | Reka AI |
| `relace` | Relace |
| `sakana` | Sakana AI |
| `salesforce` | Salesforce AI Research |
| `samsung-research` | Samsung Research |
| `sao10k` | Sao10K |
| `sarvam-ai` | Sarvam AI |
| `sber` | Sber |
| `sdaia` | SDAIA / IBM / Saudi ecosystem |
| `sk-telecom` | SK Telecom |
| `snowflake` | Snowflake |
| `tii` | Technology Innovation Institute, UAE |
| `thedrummer` | TheDrummer |
| `thinkingmachines` | Thinking Machines |
| `undi95` | Undi95 |
| `upstage` | Upstage |
| `writer` | Writer |
| `xverse-ai` | XVERSE AI |
| `yandex` | Yandex |

You can also connect any provider, hosted model, local model, or custom policy
through an HTTP `/act` agent.

## Artifact Anatomy

See the canonical [expanded package layout](https://github.com/ElectronicSlams/eSlams/blob/main/docs/ARTIFACTS.md#package-layout),
including optional signatures and volatile timing sidecars.

`manifest.json` contains:

- artifact version
- artifact id
- run id
- creation timestamp
- arena, agent, wrapper, eval suite, scoring policy, and runner versions
- verification level
- stable machine keys and public labels for verification level, artifact
  profile, scoring policy, and publication kind
- deterministic replay metadata
- match validity metadata
- file table with SHA-256 hashes
- signature metadata

When `RUNNER_ARTIFACT_SIGNING_PRIVATE_KEY` is set, Core writes an Ed25519 runner
signature:

```bash
export RUNNER_ARTIFACT_SIGNING_PRIVATE_KEY="$(python -c 'import base64; from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PrivateKey; from cryptography.hazmat.primitives.serialization import Encoding, PrivateFormat, NoEncryption; key = Ed25519PrivateKey.generate(); print("base64:" + base64.b64encode(key.private_bytes(Encoding.Raw, PrivateFormat.Raw, NoEncryption())).decode())')"
export RUNNER_ARTIFACT_SIGNING_KEY_ID=local-ci-key
eslams run --arena connect-four --agent random
eslams validate runs/latest.eslams
```

The private key is exactly 32 raw Ed25519 bytes encoded as `base64:` or `hex:`.
Malformed keys fail before agent calls or output. For a separate verifier, use
[the matching public-key recipe](https://github.com/ElectronicSlams/eSlams/blob/main/docs/ARTIFACTS.md#replay-trust-and-local-verification-keys).
The private signing key is never written to the artifact. Legacy HMAC
signatures remain readable for old artifacts, but only Ed25519 v2 signatures can
satisfy official bundle trust.

## Local Development

```bash
python -m venv .venv
. .venv/bin/activate
pip install -e ".[dev]"
pytest
ruff check src tests scripts
python -m py_compile src/eslams/*.py
```

Useful smoke commands:

```bash
eslams run --arena chess --agent first-legal --opponent first-legal --max-turns 8
eslams validate runs/latest.eslams
eslams replay runs/latest.eslams
eslams models list --provider openai --game-agent-supported
```

## Release v0.6.2

`v0.6.2` consolidates the reviewed backlog with arena correctness repairs,
private-state protection, authenticated sessions, bounded provider calls,
portable distributions and accessible replay controls. It emits
`eslams-runner:0.6.2` and `eslams-schema-bundle-v5`; the new cooperative v2
contracts represent Hanabi team scores without an individual winner.

Upgrade in Python **3.10 or newer**:

```bash
python -m pip install --upgrade eslams-core==0.6.2
```

Agent servers now bind to `127.0.0.1`; remote/container access needs an explicit
`--host 0.0.0.0`. Arena sessions require a configured secret, and Runner HTTP
requests require fresh HMAC signatures. Existing unsigned sessions cannot
resume. Exports refuse existing destinations, and truncated runs cannot claim
scoring eligibility. Revised arena behavior has distinct versions; compare
historical artifacts using their producer Core version and commit. See the
[full changelog](https://github.com/ElectronicSlams/eSlams/blob/main/CHANGELOG.md),
[session integration](https://github.com/ElectronicSlams/eSlams/blob/main/docs/PLATFORM_CONTRACTS.md),
[artifact migration notes](https://github.com/ElectronicSlams/eSlams/blob/main/docs/ARTIFACTS.md)
and [arena versions](https://github.com/ElectronicSlams/eSlams/blob/main/docs/ARENA_VERSIONING.md).

## Release v0.6.1

`v0.6.1` is the portable provenance patch for the Core 0.6 integrity release.
It emits `eslams-runner:0.6.1` and embeds the immutable release source commit
into wheel and source distributions. Schema exports from a tagged checkout and
from a clean installed package are therefore byte-identical; installed
execution does not depend on Git being present. Contract schema content and the
`eslams-schema-bundle-v4` format remain unchanged.

## Release v0.6.0

`v0.6.0` is the fail-closed execution-integrity release. It emits
`eslams-runner:0.6.0` and `eslams-schema-bundle-v4`, adds first-class
OpenRouter and Bedrock adapters, strict raw-wire parsing for all five providers,
physical-attempt and action-provenance contracts, complete usage/cost semantics,
the `official-case` validator, account-aware live preflight, unique run IDs, and
overwrite protection.

Breaking behavior changes are intentional: agent/illegal-action defaults are
now `invalid-match`; fallback can never be scoring-valid; `official_eval`
rejects fallback and hidden provider retries; run IDs are unique execution IDs
rather than deterministic config hashes; and provider receipt writers emit v2.
Core continues to read historical v1/0.5 receipt shapes.

## Release v0.5.1

`v0.5.1` is the trust and correctness patch for the Core 0.5 contract release.
The package version is `0.5.1`, runner defaults emit `eslams-runner:0.5.1`,
and release artifacts include the deterministic artifact, live-session,
provider receipt, and compact-arena fixes listed in `CHANGELOG.md`.

```bash
python3 -m pytest -q
python3 -m ruff check .
python3 -m mypy src
```

## Release v0.5.0

`v0.5.0` is the explicit game contract release. The package version is
`0.5.0`, runner defaults emit `eslams-runner:0.5.0`, and schema exports include
game topology, surface, result, help, render, animation, and usage contracts.

```bash
python3 -m pytest -q
python3 -m ruff check .
python3 -m mypy src
```

## Release v0.4.0

`v0.4.0` is the fast interactive Core substrate release. The package version is
`0.4.0`, runner defaults emit `eslams-runner:0.4.0`, and schema exports include
Core step v2, prompt package, replay event, runner-session, and observability
schemas.

```bash
python3 -m pytest -q
python3 -m ruff check .
python3 -m mypy src
python3 -m eslams_core.bench arena-step --games tic-tac-toe --iterations 10 --json out/core-step-bench.json
```

## Release v0.3.2

Core v0.3.2 is the follow-up security and correctness patch release for the
v0.3 Arena transport line. Release from a clean main checkout after tests pass:

```bash
python3 -m pytest -q
python3 -m ruff check .
python3 -m mypy src
git tag -a v0.3.2 -m "eSlams Core v0.3.2"
git push origin main v0.3.2
```

## Release v0.3.1

Core v0.3.1 is the security and correctness patch release for the v0.3 Arena
transport line. Release from a clean main checkout after tests pass:

```bash
python3 -m pytest -q
python3 -m ruff check .
python3 -m mypy src
git tag -a v0.3.1 -m "eSlams Core v0.3.1"
git push origin main v0.3.1
```

## Release v0.3.0

Core v0.3.0 is the named Arena transport contract release. Release from a clean main
checkout after tests pass:

```bash
python3 -m pytest -q
python3 -m ruff check .
python3 -m mypy src
git tag -a v0.3.0 -m "eSlams Core v0.3.0"
git push origin main v0.3.0
```

`eslams schemas export --out schemas/` writes individual schema files plus
`schema_bundle_manifest.json` with the Core package version, immutable release
source commit, schema bundle version, schema hashes, and deterministic build id.
Wheel and source distributions embed the source commit, so export fails closed
instead of depending on Git being available at runtime.

## Contribute

Good contributions make eSlams more trustworthy, more portable, or easier to
use. Strong areas to contribute:

- arena rule fixes
- better observations for existing games
- additional provider adapter support
- provider registry updates
- replay renderer improvements
- artifact validation hardening
- docs, examples, and agent templates
- tests for edge cases, illegal actions, and deterministic replay validation

Contribution flow:

1. Fork the repository.
2. Create a focused branch.
3. Add or update tests.
4. Run `pytest` and `ruff check src tests scripts`.
5. Open a pull request with a clear summary and validation notes.

Please keep changes scoped. For arena changes, include at least one test that
proves legality, scoring, terminal handling, or deterministic replay behavior.
For provider changes, include tests proving unsupported optional parameters are
not sent.

## Support eSlams

eSlams is built for serious public evaluation work. If you want to fund the
project, donate model/API tokens, sponsor infrastructure, support official eval
runs, or help with partnership work, email:

```text
hello@eslams.com
```

That is also the right contact for paid support, deployment help, private
tournament operations, and research collaborations.

## Verification Posture

Core creates `Local Artifact` proof packages. Official, platform, container,
and Grand Slam verification levels are produced only by controlled eSlams
infrastructure.

In plain terms:

- Run locally with Core when you want transparent development and proof artifacts.
- Upload or run on eslams.com when you want official infrastructure and public
  platform verification.
- Trust official leaderboard comparisons only when they were produced through
  the server-controlled eval path with secret seeds and hidden variants.

## Links

- Platform: [https://eslams.com](https://eslams.com)
- Repository: [https://github.com/ElectronicSlams/eSlams](https://github.com/ElectronicSlams/eSlams)
- Issues: [https://github.com/ElectronicSlams/eSlams/issues](https://github.com/ElectronicSlams/eSlams/issues)
- Support: `hello@eslams.com`

Session privacy: the HMAC envelope is base64 JSON containing full private state,
not encryption. Keep `session_state` on trusted servers; never stream it to a
browser. Legal action lists/descriptors are emitted only for the active human
recipient and must be privately routed to that person. Model-seat lists stay
inside the trusted runner, obtainable from the server-side state. Public views
omit legal action lists. Pending sealed actions and their explanations remain
hidden until the arena reveal phase.
