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 adamwstauffer/shidler --skill memory-hygienegit clone --depth 1 https://github.com/adamwstauffer/shidlerWrote 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/adamwstauffer/shidler/memory-hygiene)<a href="https://agentmods.dev/skills/adamwstauffer/shidler/memory-hygiene"><img src="https://agentmods.dev/badge/skills/adamwstauffer/shidler/memory-hygiene/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/skills/adamwstauffer/shidler/memory-hygiene"><img src="https://agentmods.dev/badge/skills/adamwstauffer/shidler/memory-hygiene.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00107 | $0.00907 |
| Opus 5 | $0.00053 | $0.00453 |
| Sonnet 5 | $0.00021 | $0.00181 |
| Haiku 4.5 | $0.00011 | $0.00091 |
Grade A, and why
memory-hygiene scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Memory Hygiene Skill
Keeps this project's Claude memory store coherent as it grows. The store is the external per-project memory dir — MEMORY.md (the index loaded each session) plus the single-fact *.md files under C:/Users/adamw/.claude/projects/C--GitHub-shidler/memory/. It is not a repo directory; the validator lives in the repo and operates on it.
When to invoke
- Periodically (every ~10 sessions) or when
MEMORY.mdpasses ~25 index lines. - Before a
/compact— a clean index survives summarization better. - After a session wrote memories — confirm new entries are indexed and cross-refs resolve.
- When you notice drift — a
[[link]]that 404s, an entry describing a deleted/moved file.
Step 1 — run the validator
python .claude/skills/memory-hygiene/validate_memory.py \
--memory-dir "$HOME/.claude/projects/C--GitHub-shidler/memory"
# add --strict to exit non-zero on warnings; --json for a machine-readable report
On Windows PowerShell:
python .claude/skills/memory-hygiene/validate_memory.py `
--memory-dir "$env:USERPROFILE\.claude\projects\C--GitHub-shidler\memory"
Step 2 — triage findings
| Finding | Severity | Fix |
|---|---|---|
MEMORY.md links to missing file: X |
ERROR | The index points at a deleted/renamed file. Update or remove the index line. |
missing required frontmatter key 'name' |
ERROR | Add a name: slug to the file's frontmatter. |
dangling [[slug]] |
warning | Either a typo (usually a missing feedback_/project_ prefix — fix it) or a deliberate forward-ref to a memory not yet written (leave it). If it points at a decision memo / spec, that's a misuse of [[ ]] — convert to a plain path reference. |
not referenced in MEMORY.md (orphan) |
warning | Add a one-line index pointer, or delete if the fact is obsolete/wrong. |
missing description / missing type |
warning | Backfill the frontmatter opportunistically when you touch the file. |
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 10d ago First seen · 54 lines · 107 tokens per session scan A 288c50db9150
memory-hygiene is a skill published in the GitHub repository adamwstauffer/shidler (10 stars, last pushed 2d ago), licensed MIT. It adds 107 tokens to every session and 907 once invoked, about $0.0005 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 2026-08-31.
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