Borrowing it
Nothing to install: this file belongs to atomchung/ccstory. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/atomchung/ccstory/main/AGENTS.mdgit clone --depth 1 https://github.com/atomchung/ccstoryWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/atomchung/ccstory/agents-md)<a href="https://agentmods.dev/instructions/atomchung/ccstory/agents-md"><img src="https://agentmods.dev/badge/instructions/atomchung/ccstory/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/atomchung/ccstory/agents-md"><img src="https://agentmods.dev/badge/instructions/atomchung/ccstory/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00896 | $0.00896 |
| Opus 5.5 | $0.00358 | $0.00358 |
| Sonnet 5.5 | $0.00179 | $0.00179 |
| Haiku 4.5 | $0.00090 | $0.00090 |
Grade A, and why
ccstory 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 1mo 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 — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ccstory agent guide
This is the canonical repository guide for coding agents. Codex and
Antigravity read it directly; Claude Code reads it through the thin
CLAUDE.md import. Keep shared rules here rather than copying them into
tool-specific files.
Instruction layers
- Neutral product facts belong in the code,
README.md, architecture docs, or ADRs. Do not turn this file into a second product encyclopedia. - Shared expectations for how any coding agent should work belong here.
- Claude Code-only deltas belong below the
@AGENTS.mdimport inCLAUDE.md. - Antigravity-only deltas belong in
GEMINI.mdor.agents/rules/when a real Antigravity-specific need appears. - Codex-only settings belong in
.codex/config.toml. Use itsdeveloper_instructionsonly for short Codex-specific behavioral additions; keep shared behavior in this file. - Prefer a tool-neutral intent here over parallel tool recipes. For example, say what evidence is required, then let each agent use its closest native capability. Create a tool-specific delta only when the behaviors genuinely cannot be the same.
Repository contract
- ccstory is a local-first Python 3.11+ CLI and library that turns Claude Code, Codex, and Antigravity session logs into recaps, trends, JSON, and read-only MCP results.
- Preserve behavior across every user-facing surface affected by a change: terminal cards, Markdown reports, JSON, trend/comparison output, and MCP.
- Keep provider-specific parsing under
ccstory/providers/. Shared attribution, usage, pricing, recap, and rendering logic stays provider-neutral. - Never estimate token usage or infer a model when the source does not expose
authoritative values. Keep incomplete coverage and unknown prices explicit
through the existing
usage_coverageandunpriced_modelslanes. - Preserve the local-data boundary documented in
README.md. Do not add telemetry or send transcript content to metadata services.
Concurrent-agent safety
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.
- 1mo ago First seen · 89 lines · 896 tokens per session scan A 56008d897f1a
ccstory AGENTS.md is an instructions file published in the GitHub repository atomchung/ccstory (43 stars, last pushed 1mo ago), licensed MIT. It adds 896 tokens to every session, about $0.0036 per session on Opus 5.5. 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
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.