nixos-config: Skill for Claude Code

.agents/skills/review-learning-candidates/SKILL.md

review-learning-candidates is a skill for Claude Code, Codex from FilipNowakowicz/nixos-config. It costs 39 tokens per session (1,617 once invoked), scanned A, original, MIT.

A review process for accumulated learning candidates, short notes about possible improvements to an agent's work rules or checks.

In plain words
What is it for?
Use it to evaluate candidates, reject or combine them, or turn strong ones into tests, automated checks, hooks, skills, or documentation.
Why use it?
It prevents weak or duplicate suggestions from becoming permanent project rules and requires every reviewed note to receive a clear outcome.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md; installed under .agents/ (shared by several agents).

This is FilipNowakowicz/nixos-config's own configuration. It tells Claude Code and Codex how to work on nixos-config 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 nixos-config configures →

Reuse

Borrowing it

Nothing to install: this file belongs to FilipNowakowicz/nixos-config. 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/FilipNowakowicz/nixos-config/main/.agents/skills/review-learning-candidates/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/FilipNowakowicz/nixos-config

Made for: Claude Code, Codex.

Wrote this? Show the measurements

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agentmods badge for review-learning-candidates

README.md
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Your own site
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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.

agentmods 80×15 button for review-learning-candidates

Your own site · 80×15
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Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,617 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00039 $0.01617
Opus 5 $0.00019 $0.00809
Sonnet 5 $0.00008 $0.00323
Haiku 4.5 $0.00004 $0.00162

Measured 11d ago against content hash 39749f305328, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

review-learning-candidates 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 11d 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.

.agents/skills/review-learning-candidates/SKILL.md · 138 lines

How it starts

The opening of the file, as written. The whole thing — 138 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Review Learning Candidates

Review compact learning candidates under .agents/learning/candidates/. Candidate review is explicit, batch-oriented work. Do not run it as part of normal task wrap-up.

End state of a review pass: every candidate touched is either implemented in a PR (and promoted), superseded, rejected, or consciously left open with a reason. The promotion and the candidate's status flip travel together in the same branch, and promoted/rejected/superseded files are moved out of the open queue so the index stays lean.

Goal

Turn candidate proposals into the strongest useful repo artifact:

  1. assertion / test / CI gate
  2. hook
  3. skill
  4. doc
  5. rejection

Prefer executable enforcement over prose. A candidate that can become a check, test, or invariant should not be promoted to CLAUDE.md.

For candidates already promoted by review and routed implement-fix with best_form: test, best_form: assertion, best_form: invariant, or best_form: check, use .agents/learning/scripts/scaffold-promotion-check.sh to create the failing check stub and scripts/validate.sh wiring before writing prose. The generated stub is intentionally red until you replace its TODO body with the real assertion, and it keeps a back-reference to the candidate for audit.

Workflow

1. Triage from metadata

  1. Run bash .agents/learning/scripts/validate-candidates.sh.
  2. Run bash .agents/learning/scripts/review-candidates.sh — read status counts, the route/form grouping, and the Expired open candidates list.
  3. Run bash .agents/learning/scripts/check-candidate-liveness.sh — it flags open candidates whose evidence already landed (PR merged / commit on HEAD).
  4. Choose a small batch by route, best_form, or related targets. Open only the candidate files in that batch.

2. Decide one outcome per candidate

Resolve liveness first: if check-candidate-liveness.sh reports LIKELY RESOLVED, or you confirm by hand that the fix already landed, the route is moot — mark it superseded and do not re-implement. NO SIGNAL is not a clean bill of health (the evidence just lacks a pointer); judge it from evidence and targets. Treat an implement-fix candidate as "is a fix still needed?", never as "a fix is owed" — the fix is often already in tree.

Read the full file on GitHub · 138 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. 11d ago First seen · 138 lines · 39 tokens per session scan A 39749f305328

Subscribe to this mod's changes

review-learning-candidates is a skill published in the GitHub repository FilipNowakowicz/nixos-config (5 stars, last pushed yesterday), licensed MIT. It adds 39 tokens to every session and 1,617 once invoked, about $0.0002 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.