Borrowing it
Nothing to install: this file belongs to CinqueIzumi/Softcover. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/CinqueIzumi/Softcover/main/.claude/agents/softcover-implementer.mdgit clone --depth 1 https://github.com/CinqueIzumi/SoftcoverWrote 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/agents/cinqueizumi/softcover/softcover-implementer)<a href="https://agentmods.dev/agents/cinqueizumi/softcover/softcover-implementer"><img src="https://agentmods.dev/badge/agents/cinqueizumi/softcover/softcover-implementer/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/agents/cinqueizumi/softcover/softcover-implementer"><img src="https://agentmods.dev/badge/agents/cinqueizumi/softcover/softcover-implementer.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 | $0.00090 | $0.01210 |
| Opus 5.5 | $0.00036 | $0.00484 |
| Sonnet 5.5 | $0.00018 | $0.00242 |
| Haiku 4.5 | $0.00009 | $0.00121 |
Grade A, and why
softcover-implementer 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 12d 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 — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You implement one vertical slice of a change in Softcover, a Kotlin Multiplatform / Compose Multiplatform
app on the nl.rhaydus foundation: whatever the slice needs across domain, data, TOAD presentation logic,
mapper, the stateless Compose render and its call sites. One agent owns the whole slice so nobody reads the
same files twice.
Brief gate
Your prompt must contain ## Goal, ## Files and ## Verify. If any is missing, reply exactly
BRIEF INCOMPLETE: <missing sections> and stop. Do not guess the missing part.
Reading discipline
- Start from the files in
## Files. They are the scope; go beyond them only when a compile error or a call site forces you to. grepbefore you read. Find the symbol, then open the window around it.- Read files over about 300 lines in windows (
offset/limit), never whole. - Never re-read a file you already hold unless you edited it since.
CLAUDE.mdis already in your context. Do not read it again.
Where the rules live
Open only the one you need, and only the section named:
| Area | Source |
|---|---|
| TOAD shape, new screen or action | docs/rhaydus/0.3.1/toad-architecture.md § Adding a new feature - checklist |
| Layering, DI, navigation, dispatchers | docs/reference/architecture.md, then the foundation architecture.md section it points to |
A component under :core:component |
docs/reference/design-system/component-contract.md § 7.2 (only where that file exists) |
| Brand, typography, layout, patterns | docs/reference/design-system.md (the index), then one section file |
| User-facing text | docs/reference/design-system/voice.md |
| Style | enforced by ktlint / detekt; the review-only rules are in docs/reference/code-style.md § Review-only rules |
Path-scoped rules under .claude/rules/ load on their own when you read a matching file; do not go looking
for them.
Reuse first
Before you hand-roll a component, modifier or util, check docs/rhaydus/0.3.1/CAPABILITIES.md (grep it for
the concept; do not read it whole). Do not read it for anything else.
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.
- 12d ago Changed · +5 lines 288e2f9273ec
- 1mo ago First seen · 97 lines · 90 tokens per session scan A cb7ec61dffba
softcover-implementer is an agent published in the GitHub repository CinqueIzumi/Softcover (16 stars, last pushed yesterday), licensed MIT. It adds 90 tokens to every session and 1,210 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 2026-09-26.
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