Claude Code Skills Marketplace is a collection and marketplace of skills, plugins, agents, and instructions that extend Claude Code with specialized development workflows. It is for developers who want to install existing workflows or create, validate, and package their own Claude Code skills.
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 daymade/claude-code-skills --skill prior-work-retrievalgit clone --depth 1 https://github.com/daymade/claude-code-skillsWrote 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/daymade/claude-code-skills/prior-work-retrieval)<a href="https://agentmods.dev/skills/daymade/claude-code-skills/prior-work-retrieval"><img src="https://agentmods.dev/badge/skills/daymade/claude-code-skills/prior-work-retrieval.svg" alt="Measured on agentmods" 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 | $0.00173 | $0.03018 |
| Opus 5 | $0.00086 | $0.01509 |
| Sonnet 5 | $0.00035 | $0.00604 |
| Haiku 4.5 | $0.00017 | $0.00302 |
Grade A, and why
prior-work-retrieval 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 5d 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 — 268 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Prior Work Retrieval
Run this before substantial production only when the trigger above is present. Read-only current-state checks stay direct unless the user asks for history. Its job is not to generate another summary. Its job is to answer: what already exists, which source is current, what should be reused, and what remains genuinely new?
Completion contract
A retrieval pass is complete only when all five are true:
- The task's real business outcome is written as one sentence.
- Every relevant carrier declared in the manifest reports
searched,manual_completed, or an explicit failure/coverage gap. - Candidate claims are opened at their original path or record, not accepted from a search snippet alone.
- Each adopted item has a
reuseoradaptdecision and a reason tied to the current task. If nothing is adopted, the receipt carries a concreteno_reuse_reason. scripts/prior_work.py checkaccepts the receipt for this session.
retrieved is not verified; verified is not reused. Keep those states
separate so “I searched” cannot impersonate “I used our best prior work.”
Workflow
1. Read the local operating context first
Before querying, read the current project's AGENTS.md/CLAUDE.md, navigation
index, and any North Star/current-decision file they name. Historical material
cannot override a newer explicit decision.
2. Validate the explicit source manifest
The manifest is the only discovery scope. No directory exists merely because a convention says it should. Default path:
uv run --no-project python scripts/prior_work.py \
--manifest <path> validate-manifest
The default is ~/.config/daymade/prior-work/sources.json; a project may pin
another path. Global options precede the subcommand. The schema and carrier
examples are in references/source-manifest.md.
3. Retrieve across declared carriers
Write the user-world outcome separately from the proposed implementation. Then provide two term sets:
What ships with it
8 files 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.
- evals/evals.json 5.0 KB
- references/source-manifest.md 2.9 KB
- scripts/prior_work_hook.py 38 KB runs code
- scripts/prior_work.py 60 KB runs code
- scripts/prior-work-retrieval.sh 1.0 KB runs code
- tests/fixtures/manifest.json 344 B
- tests/test_prior_work_hook.py 44 KB runs code
- tests/test_prior_work.py 30 KB runs code
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.
- 5d ago Changed · +5 lines 4a97b0ae0fb6
- 8d ago First seen · 263 lines · 173 tokens per session scan A 7e8ad45817eb
prior-work-retrieval is a skill published in the GitHub repository daymade/claude-code-skills (1,381 stars, last pushed yesterday), licensed MIT. It adds 173 tokens to every session and 3,018 once invoked, about $0.0009 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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