Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/cvet/fonline/agents-mdgit clone --depth 1 https://github.com/cvet/fonlineWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.05862 | $0.05862 |
| Opus 5 | $0.02931 | $0.02931 |
| Sonnet 5 | $0.01172 | $0.01172 |
| Haiku 4.5 | $0.00586 | $0.00586 |
Grade A, and why
fonline AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.
FOnline Engine — AI Maintainer Guide
This is the AI entry point for the reusable FOnline engine repository. For the human entry point, start with README.md. For the documentation map, start with Docs/README.md.
Scope
- This repository is the reusable engine submodule used by games such as Last Frontier.
- Engine-owned code lives under
Source/,BuildTools/,Resources/, and engine tests underSource/Tests/. - Game-specific content, scripts, native extensions, CI glue, and launch presets live in the embedding project and should not be moved into the engine unless the behavior is genuinely reusable.
Before Changing Anything
- Check whether the change belongs to the engine or to the embedding game project.
- Read the nearest existing code and follow its style; do not introduce parallel conventions.
- Verify before editing: docs may drift, and when a doc and the live source disagree, the source wins — fix the doc in the same change.
- If behavior changes, update the owning engine doc in
Docs/in the same worktree change. - Do not commit or push unless explicitly asked by the repository owner.
- Treat published branch history as immutable. Once the branch has a remote tip, do not rebase, reset, amend, or force-push it; merge upstream and the published tip so every publication is a fast-forward. Verify with
git merge-base --is-ancestor <remote-tip> HEADbefore pushing, and stop instead of rewriting history when that check fails.
Documentation Map
The full maintained index is Docs/README.md; use it when a topic is not listed here. Convention-critical docs for maintainers:
- Docs/Architecture.md - engine layer map and where a behavior belongs.
- Docs/SourceTree.md - source-tree navigation.
- Docs/Essentials.md - low-level platform, logging, memory, filesystem, serialization, sockets, and utilities.
- Docs/ConfigurationAndDataSources.md - config parsing, settings, data sources, file lookup, and caches.
- Docs/Testing.md - test-suite inventory, generated test targets, coverage, and validation routing.
- Docs/DocumentationMaintenance.md - source-grounded docs maintenance workflow.
- Docs/ThirdPartyMaintenance.md - vendored dependency update, pruning, version pin, and
(FOnline Patch)workflow. - Docs/ClientUpdater.md - client host/runtime split, ABI, updater protocol, and
UpdaterBackend. - Docs/Debugging.md - stack traces, debugger helpers, native debugging, and validation notes.
- Docs/Nullability.md -
T?script /ptr<T>·nptr<T>native boundary contract. - Docs/SmartPointers.md - native smart-pointer vocabulary (
ptr<T>/nptr<T>borrows,unique_*/refcount_*owners, engine-ownshared_ptr/weak_ptr), raw-pointer allowlist, and audit expectations. - Docs/ExceptionSafety.md - engine-invariant stability under exceptions: terminate-on-OOM allocation model, entity-lifecycle throw-as-signal contract, and the
FO_STRONG_ASSERTdisposition rules. - Docs/ThreadSafetyAnalysis.md -
FO_TSA_*Clang Thread Safety Analysis annotations, locking primitives, and-Werror=thread-safetyenforcement. - Docs/MapperTools.md - mapper automation and native mapper helper integration points.
- Docs/WebDebugging.md - web target build/debug workflow.
- Docs/AndroidDebugging.md - Android target build/debug workflow.
- PUBLIC_API.md - public API notes.
- TUTORIAL.md - engine tutorial.
- Source/README.md - source-tree overview.
- Source/Tests/README.md - engine unit-test suites.
- BuildTools/README.md - build-tooling notes.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 108 lines · 5,862 tokens per session scan A 4412211280b8
fonline AGENTS.md is an instructions file published in the GitHub repository cvet/fonline (334 stars, last pushed 3d ago), licensed MIT. It adds 5,862 tokens to every session, about $0.0293 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
fonline-tla AGENTS.md
Instructions for cvet/fonline-tla, covering fonline: the life after - agent instructions, what this project is, repository orientation, build and verify and engine update workflow.
fonline-tla CLAUDE.md
Instructions for cvet/fonline-tla, a project described as: FOnline: The Life After.
fonline-tla copilot-instructions.md
Instructions for cvet/fonline-tla: Follow the repository agent instructions in /AGENTS.md.
comedot AGENTS.md
Instructions for InvadingOctopus/comedot, covering agents.md, guidelines for the comedot project and repository, project overview, folder structure & module organization and subsystems.
FlingEngine AGENTS.md
Instructions for flingengine/FlingEngine, covering agents.md, what this project is, build, tests and coding style.
ReignsAgent AGENTS.md
Instructions for Sisyphe42/ReignsAgent, covering reignsagent system specification & agent guidelines, 0. project goal, 1. core architecture (decoupled design), 2. extensibility specification and 3. maintenance protocols.