Borrowing it
Nothing to install: this file belongs to footprintjs/footPrint. 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/footprintjs/footPrint/main/AGENTS.mdgit clone --depth 1 https://github.com/footprintjs/footPrintWrote 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/footprintjs/footprint/agents-md)<a href="https://agentmods.dev/instructions/footprintjs/footprint/agents-md"><img src="https://agentmods.dev/badge/instructions/footprintjs/footprint/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/footprintjs/footprint/agents-md"><img src="https://agentmods.dev/badge/instructions/footprintjs/footprint/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 | $0.17452 | $0.17452 |
| Opus 5.5 | $0.06981 | $0.06981 |
| Sonnet 5.5 | $0.03490 | $0.03490 |
| Haiku 4.5 | $0.01745 | $0.01745 |
Grade A, and why
footPrint 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 7d 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 — 1,130 lines — stays where its author put it; the contents beside it link to each section on GitHub.
footprint.js — AI Coding Instructions
This is the footprint.js library — the flowchart pattern for backend code. Self-explainable systems that AI can reason about.
Every TypeScript block in this file is type-checked (strict) and run against the built package (footprintjs 9.32.0); the
// …lines under aconsole.logare that run's real output.
Core Principle
Collect during traversal, never post-process. All data collection (narrative, metrics, manifest, topology, in/out boundaries) happens as side effects of the single DFS traversal pass. Never walk the tree again after execution.
Architecture — Library of Libraries
FootPrint 10 has six engine doors; the record has three separate foottrace doors. Import from the package that owns the declaration; FootPrint does not re-export record declarations.
| Import | What it is for |
|---|---|
footprintjs |
The main door: flowChart, FlowChartExecutor, decide / select, narrative, the built-in recorder classes, interrupt, and the public types |
footprintjs/recorders |
Recorder factories — narrative(), metrics(), debug(), manifest(), adaptive(), milestone(), windowed() — and CompositeRecorder |
footprintjs/trace |
Engine tracing: recorder stores (KeyedStore, SequenceStore, BoundaryStateStore), walkSubflowSpec, topologyRecorder() / inOutRecorder(), control-dependency and quality recorders |
foottrace |
Record shapes (CommitBundle, TraceEntry, MemoryPatch), runtime-ID helpers, commit queries, causal/variable slices, stateAt, timeTravel, CommitRangeIndex, HONESTY_CODES |
foottrace/write |
Writing a record yourself: the record layer the engine writes with — SharedMemory (the heap), EventLog (the log), RecordFrame (one step's frame) and their option types |
foottrace/paths |
Record-path encoding/decoding, safe nested access, setNestedValue / updateNestedValue for diagnostic bags |
footprintjs/advanced |
Engine internals (StageContext, FlowchartTraverser, ScopeFacade, scope providers, SCOPE_METHOD_NAMES, ArrayMergeMode, run policy and RedactionRule). No record declarations are exported here. |
footprintjs/detach |
Fire-and-forget child charts and their drivers |
footprintjs/zod |
Opt-in zod bridge (defineScopeFromZod, …) — the core never imports zod |
footprintjs/sinks |
NODE ONLY — fileSink(path) / readRecordFile(path): the crash-safe record as JSON lines (the executor's sink option; read back with foottrace's readStoredRecord) |
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.
- 7d ago Changed · +1 lines · +53 tokens per session 2e2b8187f625
- 8d ago Changed · +19 tokens per session 5a04f6643095
- 13d ago Changed · +2 lines · -63 tokens per session 932f27fac233
- 14d ago Changed · +1 lines · +135 tokens per session 0df392e2cc85
- 17d ago Changed · +42 tokens per session 6f01f2224459
- 18d ago Changed · +26 tokens per session 76f5859db2ec
- 19d ago Changed · +4 lines · +296 tokens per session 6c4710f91367
- 20d ago Changed · +476 lines · +7,465 tokens per session ce0c268b4374
- 21d ago Changed · +159 tokens per session 77bb65e86a58
- 25d ago First seen · 646 lines · 9,320 tokens per session scan A bd132baf99fb
footPrint AGENTS.md is an instructions file published in the GitHub repository footprintjs/footPrint (21 stars, last pushed yesterday), licensed MIT. It adds 17,452 tokens to every session, about $0.0698 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
vibetags com-example-service-TransactionalPaymentService.instructions.md
Instructions for PIsberg/vibetags, covering copilot instructions for transactionalpaymentservice and strict exception handling.
vibetags com-example-gmm-platform-FeatureGate.md
Instructions for PIsberg/vibetags, covering amazon kiro steering: featuregate and feature flag gate.
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.