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echo-sleuth-for-claude: Instructions file for Claude Code

AGENTS.md

echo-sleuth-for-claude AGENTS.md is an instructions file for Claude Code, Codex, OpenCode from xiaolai/echo-sleuth-for-claude. It costs 1,105 tokens per session, scanned A, original, ISC.

Repository instructions for Echo Sleuth, a tool that examines saved Claude Code conversation files. It can help recall past work, trace decisions, summarize sessions, and inspect project history.

In plain words
What is it for?
Use them when developing or maintaining features for session recall, recaps, timelines, lessons, memory audits, extraction, cleanup, or dashboards.
Why use it?
They explain where conversation records live and how the project’s commands, agents, skills, and scripts work together.

Instructions file for Claude CodeCodexOpenCode

Written for Claude Code and Codex and OpenCode: ${CLAUDE_PLUGIN_ROOT} variable, but also the file is AGENTS.md. Also seen: reads .claude/ paths; mentions Claude Code.

This is xiaolai/echo-sleuth-for-claude's own configuration. It tells Claude Code, Codex and OpenCode how to work on echo-sleuth-for-claude itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything echo-sleuth-for-claude configures →

Runs only inside a plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else, and the catalogue could not identify which plugin ships it.

not rated 9repo 1mo ago A scan 1,105 tokens original ISC
View source ↗ xiaolai/echo-sleuth-for-claude
Reuse

Borrowing it

Nothing to install: this file belongs to xiaolai/echo-sleuth-for-claude. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/xiaolai/echo-sleuth-for-claude/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/xiaolai/echo-sleuth-for-claude

Made for: Claude Code, Codex, OpenCode.

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README.md
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Per session 1,105 This file is loaded in full into every session.
When invoked 1,105 The same file — it is already loaded in full.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01105 $0.01105
Opus 5.5 $0.00442 $0.00442
Sonnet 5.5 $0.00221 $0.00221
Haiku 4.5 $0.00111 $0.00111

Measured 1mo ago against content hash 916cd4081dde, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

echo-sleuth-for-claude AGENTS.md scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- curl (optional, needed only for URL validation in /audit --deep)
AGENTS.md · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Echo Sleuth — Plugin Development Guide

Purpose

Echo Sleuth mines Claude Code session JSONL files for insights. It helps users recall past work, trace decisions, learn from mistakes, and understand file histories by analyzing ~/.claude/projects/ conversation data.

Architecture

commands/  → User-facing slash commands (entry points)
agents/    → Task-specific agents dispatched by commands via the Task tool
skills/    → Reusable knowledge (parsing rules, git patterns, synthesis taxonomy)
scripts/   → Python/bash tools that do the actual JSONL parsing and extraction

Flow: Commands dispatch to agents. Agents use skills for domain knowledge and call scripts (via Bash tool) for data extraction. Scripts are thin bash wrappers around scripts/echolib.py.

Commands

  • /recall — Search and analyze past sessions
  • /recap — Summarize recent sessions
  • /timeline — Chronological project history (sessions + git)
  • /lessons — Extract lessons learned
  • /dashboard — Global memory overview and staleness alerts
  • /audit — Memory staleness audit (heuristic or deep)
  • /extract — Extract knowledge from conversation sessions
  • /prune — Interactive memory cleanup

Agents

  • recall — Unified search: session finding, decision archaeology, mistake hunting
  • file-historian — Trace a file's history across sessions and git
  • analyze — Deep analysis of specific sessions
  • schema-scout — Detect JSONL schema changes
  • memory-auditor — Deep content-aware memory verification

Skills

  • jsonl-core — Canonical JSONL parsing infrastructure and record type reference
  • git-mining — Git log/blame/diff patterns for correlating commits with sessions
  • experience-synthesis — Taxonomy for categorizing insights (decisions, mistakes, patterns)
  • memory-management — Memory format, staleness scoring, and routing knowledge

Scripts

All in scripts/, require only Python 3.6+ (stdlib only) and bash. Git scripts additionally require git.

  • echolib.py — Core Python parsing module (no pip dependencies)
  • list-sessions.sh — Index-based session listing with grep/limit
  • session-stats.sh — Single-pass session statistics
  • extract-messages.sh — Human-readable message extraction
  • extract-tools.sh — Tool call extraction with error filtering
  • extract-files-changed.sh — Files edited in a session
  • parse-jsonl.sh — Low-level JSONL parser with schema detection
  • build-index.sh — Build fallback index for projects without sessions-index.json
  • git-context.sh / git-sessions.sh — Git history helpers
  • memory-dashboard.sh — Memory overview and heuristic audit output
  • extract-knowledge.sh — Two-pass knowledge extraction from sessions
  • recall-lite.sh — End-to-end no-API recall: list-sessions + extract-messages + extract-tools, dumped raw. Wraps the others. Invoked by /recall --lite and runnable directly from a shell.

Read the full file on GitHub · 72 lines

Changes

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.

  1. 1mo ago First seen · 72 lines · 1,105 tokens per session scan A 916cd4081dde

Subscribe to this mod's changes

echo-sleuth-for-claude AGENTS.md is an instructions file published in the GitHub repository xiaolai/echo-sleuth-for-claude (9 stars, last pushed 1mo ago), licensed ISC. It adds 1,105 tokens to every session, about $0.0044 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-30.

Memory and context
Related

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