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Agent skill

History Hygiene

by bradygaster in bradygaster/squad

Record reconciled final outcomes to history.md, not intermediate requests or obsolete claims

MITAuto-check passed

Install History Hygiene

skills CLI
$ npx skills add bradygaster/squad --skill history-hygiene -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install bradygaster/squad history-hygiene --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/bradygaster/squad.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.copilot/skills/history-hygiene .claude/skills/history-hygiene && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
history-hygiene
GitHub stars
3.3k
Token cost
~475 tokens
SKILL.md length
213 words
Files
1
Skills in repo
31
Repo updated
First seen
Licence
MIT

At a glance

Record reconciled final outcomes to history.md, not intermediate requests or obsolete claims

  • SKILL.md covers Context, Patterns, Examples and Anti-Patterns
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

History Hygiene is an agent skill from bradygaster/squad. Record reconciled final outcomes to history.md, not intermediate requests or obsolete claims

Its SKILL.md is about 480 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Squad: AI agent teams for any project. The licence is MIT.

Example prompts

  • “/history-hygiene”

What it can do on your machine

Read from SKILL.md and the folder at commit e0c84dd. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

History Hygiene loads about 475 tokens when it runs. Until then it costs about 27 tokens; SKILL.md has 213 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~27
When it runs · the whole SKILL.md, loaded when a task matches
~475

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from bradygaster/squad at commit e0c84dd, republished under its MIT licence (© bradygaster). 213 words, ~475 tokens.

Download SKILL.mdSave it as .claude/skills/history-hygiene/SKILL.md (or your agent's skills folder).
name
history-hygiene
description
Record reconciled final outcomes to history.md, not intermediate requests or obsolete claims
domain
documentation, team-collaboration
confidence
high
source
earned (stale history reversal incident, team intervention)

Context

History files are cold-start context, not the source of truth for live behavior. Stale or incorrect entries poison decision-making downstream. A stale-history incident proved that an old history claim can cause future spawns to repeat a reversed decision. Reconcile an operational claim with current implementation, workflows, tests, documentation, skills, and applicable decisions before acting on it.

Patterns

  • Record the final outcome, not the initial request.
  • Wait for confirmation before writing to history — don't log intermediate states.
  • If a decision reverses, update the entry immediately — don't leave stale data.
  • Link authority for operational facts. Name the current source or workflow when a lesson depends on live behavior.
  • Promote reusable rules. Move procedures and incident lessons that future roles need into a focused skill; history should retain only the evidence and outcome.

Examples

✓ Correct:

  • "Migration target: v0.8.17 (initial target was later corrected before execution)"
  • "Node runtime: follow the current package.json engines.node requirement"

✗ Incorrect:

  • "Migration target: v0.6.0" (when that request was later reversed)
  • Recording what was requested instead of what actually happened
  • Logging entries before outcome is confirmed

Anti-Patterns

  • Writing intermediate or "for now" states to disk
  • Attributing decisions without confirming final direction
  • Treating history as authoritative over live source or workflow behavior
  • Copying dated assignments, status reports, or retired workarounds into a reusable skill

© bradygaster, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .copilot/skills/history-hygiene of bradygaster/squad.

Open the folder on GitHubat commit e0c84dd

Compare with similar skills

History Hygiene next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

History Hygiene compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
History Hygiene this skillbradygaster/squad3.3k—~475Automated safety check: PassMIT
Recordingcodewhale-hq/Codewhale41k—~540Automated safety check: PassMIT
History HygieneFritzAndFriends/SharpSite1451 repos~396Automated safety check: PassMIT
Architecture Decision Recordsaffaan-m/ECC277k4 repos~1.8kAutomated safety check: PassMIT
Architecture Decision Recordsaffaan-m/ECC277k1 repos~863Automated safety check: PassMIT
Architecture Decision Recordsaffaan-m/ECC276k—~1.1kAutomated safety check: PassMIT

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Questions about History Hygiene

What does History Hygiene do?

Record reconciled final outcomes to history.md, not intermediate requests or obsolete claims. History Hygiene is an agent skill from bradygaster/squad.

How do I install History Hygiene in Claude Code?

Run `npx skills add bradygaster/squad --skill history-hygiene -a claude-code`. Or copy the skill folder (.copilot/skills/history-hygiene in bradygaster/squad) into .claude/skills/history-hygiene in your project. Claude Code loads it when a task matches its description.

How do I install History Hygiene in Codex?

Run `npx skills add bradygaster/squad --skill history-hygiene -a codex`. Or copy the skill folder (.copilot/skills/history-hygiene in bradygaster/squad) into .agents/skills/history-hygiene in your project. Codex loads it when a task matches its description.

Can I use History Hygiene in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add bradygaster/squad --skill history-hygiene -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/history-hygiene, .gemini/skills/history-hygiene, .github/skills/history-hygiene and .opencode/skills/history-hygiene in your project.

What does History Hygiene need to run?

SKILL.md names no scripts, command-line tools or credentials: History Hygiene is instructions for the agent only.

Does History Hygiene access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is History Hygiene safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does History Hygiene use?

History Hygiene is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does History Hygiene use?

About 475 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to History Hygiene?

Skills that share tags, products or a category with History Hygiene: Recording (codewhale-hq/Codewhale, 41k stars), History Hygiene (FritzAndFriends/SharpSite, 145 stars), Architecture Decision Records (affaan-m/ECC, 277k stars) and Architecture Decision Records (affaan-m/ECC, 277k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains History Hygiene?

bradygaster (a GitHub user) maintains it in bradygaster/squad, which has 3,261 GitHub stars. The repository holds 31 skills in this directory. The repository was last updated on October 10, 2026.

Source: bradygaster/squad on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.