Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add ddunnock/claude-plugins/plugin install requirements-devWrote 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/ddunnock/claude-plugins/requirements-dev)<a href="https://agentmods.dev/skills/ddunnock/claude-plugins/requirements-dev"><img src="https://agentmods.dev/badge/skills/ddunnock/claude-plugins/requirements-dev/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/ddunnock/claude-plugins/requirements-dev"><img src="https://agentmods.dev/badge/skills/ddunnock/claude-plugins/requirements-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00103 | $0.03825 |
| Opus 5.5 | $0.00041 | $0.01530 |
| Sonnet 5.5 | $0.00021 | $0.00765 |
| Haiku 4.5 | $0.00010 | $0.00382 |
Grade A, and why
requirements-dev 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 1mo 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 — 247 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Requirements Development (INCOSE GtWR v4)
Transform concept development artifacts into formal, INCOSE-compliant requirements through a structured three-phase pipeline with gate-controlled progression.
Deliverables
This skill produces three primary documents plus supporting registries:
| Deliverable | Format | Content |
|---|---|---|
| REQUIREMENTS-SPECIFICATION.md | Markdown | All requirements organized by block and type |
| TRACEABILITY-MATRIX.md | Markdown | Bidirectional chain: source → need → requirement → V&V |
| VERIFICATION-MATRIX.md | Markdown | All requirements with V&V methods, criteria, status |
| *.reqif | XML | Optional ReqIF interchange export |
| JSON registries | JSON | needs, requirements, traceability, sources, assumptions, notes |
What ships with it
60 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.
- .claude-plugin/plugin.json 1.2 KB
- agents/document-writer.md 2.6 KB
- agents/gap-analyst.md 8.8 KB
- agents/quality-checker.md 4.7 KB
- agents/skeptic.md 2.0 KB
- agents/tpm-researcher.md 5.6 KB
- commands/reqdev.decompose.md 5.3 KB
- commands/reqdev.deliver.md 5.5 KB
- commands/reqdev.gaps.md 8.3 KB
- commands/reqdev.init.md 11 KB
- commands/reqdev.needs.md 8.9 KB
- commands/reqdev.requirements.md 17 KB
- commands/reqdev.research.md 4.3 KB
- commands/reqdev.resume.md 6.6 KB
- commands/reqdev.status.md 5.0 KB
- commands/reqdev.validate.md 7.5 KB
- CROSS-SKILL-ANALYSIS.md 17 KB
- data/absolutes.json 50 B
- data/escape_clauses.json 211 B
- data/pronouns.json 73 B
- data/vague_terms.json 242 B
- hooks/hooks.json 426 B
- hooks/scripts/update-state-on-write.sh 2.4 KB runs code
- HOW_TO_USE.md 22 KB
- pyproject.toml 199 B
- README.md 19 KB
- references/attribute-schema.md 2.2 KB
- references/decomposition-guide.md 2.4 KB
- references/incose-rules.md 6.0 KB
- references/type-guide.md 3.3 KB
- references/vv-methods.md 2.4 KB
- scripts/assumption_tracker.py 11 KB runs code
- scripts/check_tools.py 5.6 KB runs code
- scripts/decompose.py 7.8 KB runs code
- scripts/gap_analyzer.py 19 KB runs code
- scripts/ingest_concept.py 6.3 KB runs code
- scripts/init_session.py 2.8 KB runs code
- scripts/needs_tracker.py 13 KB runs code
- scripts/notes_tracker.py 13 KB runs code
- scripts/quality_rules.py 15 KB runs code
- scripts/reqif_export.py 11 KB runs code
- scripts/requirement_tracker.py 15 KB runs code
- scripts/set_validator.py 13 KB runs code
- scripts/shared_io.py 1.9 KB runs code
- scripts/source_tracker.py 4.1 KB runs code
- scripts/traceability.py 8.2 KB runs code
- scripts/update_state.py 8.8 KB runs code
- templates/requirements-specification.md 1.8 KB
- templates/state.json 927 B
- templates/traceability-matrix.md 1.3 KB
- templates/verification-matrix.md 1.8 KB
- tests/__init__.py 0 B runs code
- tests/conftest.py 1.6 KB runs code
- tests/test_assumption_tracker.py 10 KB runs code
- tests/test_decomposition.py 9.9 KB runs code
- tests/test_gap_analyzer.py 17 KB runs code
- tests/test_ingest_concept.py 10 KB runs code
- tests/test_init_session.py 2.6 KB runs code
- tests/test_integration.py 21 KB runs code
- tests/test_needs_tracker.py 11 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.
- 1mo ago First seen · 247 lines · 103 tokens per session scan A 69a93e00517b
requirements-dev is a skill published in the GitHub repository ddunnock/claude-plugins (14 stars, last pushed 7mo ago), licensed MIT. It adds 103 tokens to every session and 3,825 once invoked, about $0.0004 per session on Opus 5.5. 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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