fix-log

A documentation rule for recording every completed fix in a dated Markdown file under docs/fixes/.

In plain words
What is it for?
Use it when implementing, reviewing, or documenting bug fixes, repairs, debugging work, infrastructure changes, or workflow fixes.
Why use it?
It keeps a durable record of what changed, why it changed, what checks actually ran, and any remaining work, without rewriting older records.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/cloudposse/atmos/fix-log
Any agent
npx skills add cloudposse/atmos --skill fix-log
Clone the repo
git clone --depth 1 https://github.com/cloudposse/atmos

Made for: Claude Code, Codex.

Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 693 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00050 $0.00693
Opus 5 $0.00025 $0.00347
Sonnet 5 $0.00010 $0.00139
Haiku 4.5 $0.00005 $0.00069

Measured 2d ago against content hash 2d2fd8ad44fc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

fix-log 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 2d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/validate-fix-doc.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.claude/skills/fix-log/SKILL.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fix Documentation

Every implemented fix must leave a short Markdown record in docs/fixes/.

docs/fixes/ already contains 90+ pre-existing records in an older, inconsistent format (some with a # Fix: <title> heading, some without; some with a **Date:** line, some without; and 25+ different ad hoc ## section names across the set — ## Problem, ## Root Cause, ## Tests, ## Related, etc.). Do not migrate those — they stay as-is. All new records use the merged format below, which keeps the old convention's most useful, scannable elements (the # Fix: heading, the explicit **Date:** line) and adopts a single, consistent five-section structure instead of ad hoc headers.

Workflow

  1. Before final ready status, create or update docs/fixes/YYYY-MM-DD-<slug>.md.
  2. Use the current local date for YYYY-MM-DD.
  3. Use a lowercase slug with letters, numbers, and hyphens.
  4. Record what changed, why it changed, validation that actually ran, and follow-ups.
  5. Do not invent validation. If a check was skipped or blocked, say why.
  6. If the fix leaves any follow-up work (anything under Follow-ups other than None.), it must satisfy CLAUDE.md's Follow-up Tracking (MANDATORY) section: open a GitHub issue and link it by number (e.g. #1234) in the Follow-ups section. A Follow-ups entry like "a follow-up will..." with no issue number is incomplete — the work will never be tracked.

Required Document Shape

# Fix: <Title>

**Date:** YYYY-MM-DD

## Summary

## Context

## Changes

## Validation

## Follow-ups
  • <Title> is a short human-readable description of the fix (inline code spans are fine, e.g. # Fix: `describe affected` now checks `source` and `provision` sections).
  • **Date:** restates the filename's date for at-a-glance scanning; keep it in sync with the filename.
  • Use None. in Follow-ups only when no follow-up is known.

Validation

After creating or updating fix docs, run:

bash .claude/skills/fix-log/scripts/validate-fix-doc.sh docs/fixes/*.md

Read the full file on GitHub · 67 lines

Files

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.

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. 2d ago First seen · 67 lines · 50 tokens per session scan A 2d2fd8ad44fc

Subscribe to this mod's changes

fix-log is a skill published in the GitHub repository cloudposse/atmos (1,367 stars, last pushed today), licensed Apache-2.0. It adds 50 tokens to every session and 693 once invoked, about $0.0003 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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