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 skills add xiaolai/echo-sleuth-for-claude --skill memory-managementgit clone --depth 1 https://github.com/xiaolai/echo-sleuth-for-claudeWrote 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/skills/xiaolai/echo-sleuth-for-claude/memory-management)<a href="https://agentmods.dev/skills/xiaolai/echo-sleuth-for-claude/memory-management"><img src="https://agentmods.dev/badge/skills/xiaolai/echo-sleuth-for-claude/memory-management.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 | $0.00048 | $0.00990 |
| Opus 5 | $0.00024 | $0.00495 |
| Sonnet 5 | $0.00010 | $0.00198 |
| Haiku 4.5 | $0.00005 | $0.00099 |
Grade A, and why
memory-management 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 8d 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.
| URL | Starts with `http://` or `https://` | curl HEAD request | How it starts
The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Memory Management
Memory File Format
Frontmatter schema (simple key: value, NOT general YAML):
---
name: <string, required> # short identifier
description: <string, required> # one-line summary for relevance matching
type: <enum, required> # value | user | feedback | project | reference
---
- All values are plain strings, no quoting needed unless value contains
: - No nested structures, no lists, no multi-line values
- Body follows after the closing
---delimiter as markdown
MEMORY.md Index Format
- Plain markdown file, no frontmatter
- Contains links to individual memory files with brief descriptions
- Lines after 200 are truncated by Claude Code's loader — keep concise
- Entry format:
- [filename.md](filename.md) — brief description - When writing: create individual .md file first, then append entry
Staleness Scoring
Exponential decay: score = 100 * (1 - exp(-age_days * ln(2) / half_life))
| Type | Half-life | Score 50 at | Score 90 at |
|---|---|---|---|
| value | 365 days | 365d | ~1213d |
| user | 180 days | 180d | ~598d |
| feedback | 90 days | 90d | ~299d |
| reference | 60 days | 60d | ~199d |
| project | 14 days | 14d | ~47d |
| unknown | 30 days | 30d | ~100d |
Score-to-action: 0-50 = keep, 50-75 = review, 75-100 = prune.
Deep verification modifiers (additive, capped at 100):
- +20 if referenced file is missing
- +30 if referenced function/class not found
- +10 if URL returns non-200
- +15 if referenced branch doesn't exist
Claim Extraction Heuristics (Deep Audit)
| Claim Type | Detection Pattern | Verification |
|---|---|---|
| File path | Contains /, ends with file extension |
Glob for existence |
| Function/class | Backtick identifier in camelCase/PascalCase/snake_case | Grep in project |
| URL | Starts with http:// or https:// |
curl HEAD request |
| Branch | After "branch" keyword or git pattern in backticks | git branch -a |
| Package | In dependency/package context | Grep in manifest files |
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.
- 8d ago First seen · 95 lines · 48 tokens per session scan A 03041d9b7c6e
memory-management is a skill published in the GitHub repository xiaolai/echo-sleuth-for-claude (9 stars, last pushed 14d ago), licensed ISC. It adds 48 tokens to every session and 990 once invoked, about $0.0002 per session on Opus 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 2026-08-31.
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