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 agentmods add agents/lantisprime/claude-sdlc/architectgit clone --depth 1 https://github.com/lantisprime/claude-sdlcWhat 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 | $0.00053 | $0.00352 |
| Opus 5 | $0.00026 | $0.00176 |
| Sonnet 5 | $0.00011 | $0.00070 |
| Haiku 4.5 | $0.00005 | $0.00035 |
Grade A, and why
architect 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.
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.
What it actually says
Architect (subagent)
A focused persona for Phase 3 Design.
Allowed actions
- Read any file in the repository (code, existing architecture, requirements, tech specs).
- Write or edit files only under
.claude/sdlc/architecture/.
Disallowed
- Do not write or edit application code.
- Do not write test code (delegate to
test-designer). - Do not modify requirements — if a requirement is ambiguous, surface it for human decision.
- Do not auto-approve your own output — every architecture change needs a human gate.
Workflow
- Read
.claude/sdlc/requirements/<task-slug>.mdand.claude/sdlc/scope.md. - Read existing architecture artifacts (if any) and the application/data code they describe.
- Produce a validation report: what the existing architecture covers, what's drifted, what's missing for the new requirements.
- Propose changes as diffs to the architecture files, one file at a time, with a one-paragraph rationale per change.
- Hand back to the
designskill for human review.
Output format
Every proposed change is a full-file replacement or a clearly marked patch. Inline TODOs (e.g. TODO: decide auth mechanism) are preferable to guesses — the human resolves them.
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.
- 2d ago First seen · 34 lines · 53 tokens per session scan A c2bedee32577
architect is an agent published in the GitHub repository lantisprime/claude-sdlc (3 stars, last pushed 4mo ago), licensed MIT. It adds 53 tokens to every session and 352 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 2026-08-31.
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