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/CLAUDE.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/claude-md)<a href="https://agentmods.dev/instructions/footprintjs/footprint/claude-md"><img src="https://agentmods.dev/badge/instructions/footprintjs/footprint/claude-md.svg" alt="Measured on agentmods" 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 | $0.04487 | $0.04487 |
| Opus 5 | $0.02243 | $0.02243 |
| Sonnet 5 | $0.00897 | $0.00897 |
| Haiku 4.5 | $0.00449 | $0.00449 |
Grade A, and why
footPrint CLAUDE.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 6d 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 — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
footprintjs — feature-work map
Self-explaining flowchart engine: a fluent builder emits a static chart; one DFS pass executes it while observer channels + a commit log capture everything ("collect during traversal, never post-process"). This file maps seams and blast radius; for API description read the code/README — trust the code where any doc disagrees.
Module map
Entry points: footprintjs (public API) · /recorders (factories) · /trace (commitLog queries, stores, causalChain) · /advanced (engine internals) · /detach · /zod (opt-in; zod never imported by core). New public symbols are wired through the barrel that OWNS them (canonical path); /advanced re-exports only a small hand-picked trace subset — do not assume export * chaining.
| src/lib/ | one job |
|---|---|
| capture/ | retention policies + bounded payload summarization (leaf; shared by tracking dials AND deferred-observer capture) |
| memory/ | transactional state: SharedMemory heap, StageContext frames, TransactionBuffer staging, EventLog commit log — PLUS trace analysis (backtrack.ts causalChain, commitLogUtils.ts) |
| schema/ | duck-typed validation (.safeParse/.parse ⇒ 'parseable') |
| builder/ | fluent DSL → FlowChartSpec → StageNode graph; build-time StructureRecorder channel. NOT standalone: imports runner's makeRunnable (FlowChartBuilder.ts:18) |
| scope/ | ScopeFacade per stage (tracked get/set, $emit, frozen args/env); built-in ScopeRecorders in scope/recorders/ |
| reactive/ | TypedScope deep Proxy over the facade |
| decide/ | decide()/select() evidence capture |
| recorder/ | stores (KeyedStore/SequenceStore/BoundaryStateStore), CombinedRecorder routing, built-ins (Topology/InOut/ControlDep/Quality) |
| slice/ | variable-first backward slicing (triage query layer): sliceForKey (anchor at last writer → causalChain) + arrayProvenance/elementProvenance (append-fold element births — the agent mega-key fix) + KeysReadSource strategies. Pure post-hoc queries; imports memory/ ONLY (see src/lib/slice/README.md) |
| pause/ | PauseSignal / FlowchartCheckpoint types + interrupt(scope, payload) (throws InterruptSignal; converted to PauseSignal at the StageRunner boundary, pausedBy:'interrupt') |
| engine/ | FlowchartTraverser + handlers/; narrative/ = the whole FlowRecorder channel (dispatcher + 9 strategies), not just text; branchSegment.ts = the ONE owner of the generated-segment grammar (<stageId>~<index>, marker ~ RESERVED); executeStage (:720) = the ONE funnel every stage fn passes through — and therefore the ONE owner of the declarative retry loop |
| runner/ | FlowChartExecutor wiring (runtime, recorders, pause/resume, snapshot, DeferredObserverTier). RunContext.ts is a fluent run builder, NOT the threaded per-run context |
| observer-queue/ | pure deferred-delivery pipeline (engine imports IT, never reverse) |
| contract/, detach/ | I/O schema + OpenAPI; fire-and-forget child charts (drivers passed explicitly) |
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.
- 6d ago First seen · 91 lines · 4,487 tokens per session scan A 6a744b7a90f5
footPrint CLAUDE.md is an instructions file published in the GitHub repository footprintjs/footPrint (20 stars, last pushed 6d ago), licensed MIT. It adds 4,487 tokens to every session, about $0.0224 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.
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