Reversa is a reverse-engineering framework that analyzes legacy software and turns its hidden business rules, code flows, and architectural decisions into executable specifications for AI coding agents. Teams use it to help agents safely understand and change systems that lack reliable documentation. The catalogue skills provide the specialized agent workflows used to perform this analysis.
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 sandeco/reversa --skill impeccablegit clone --depth 1 https://github.com/sandeco/reversaWrote 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/sandeco/reversa/impeccable)<a href="https://agentmods.dev/skills/sandeco/reversa/impeccable"><img src="https://agentmods.dev/badge/skills/sandeco/reversa/impeccable/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/sandeco/reversa/impeccable"><img src="https://agentmods.dev/badge/skills/sandeco/reversa/impeccable.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 | $0.00131 | $0.02699 |
| Opus 5.5 | $0.00052 | $0.01080 |
| Sonnet 5.5 | $0.00026 | $0.00540 |
| Haiku 4.5 | $0.00013 | $0.00270 |
Grade A, and why
impeccable 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 today.
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 — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.
This skill gives you the tools and permission to make design that earns the name out-of-distribution craft. Work as an award-winning design director would: production-grade code, a clear POV, a deep grasp of what the client and its users need, and exceptional craft.
Core principles:
- Finish the job. No hedging, no shortcuts: the deliverable is complete, except assets the user must provide.
- Scale ambition to the surface's mode (see Modes). Persuade and Experience get full commitment: bold, distinct work with a point of view. On Operate and Read, ambition shows as precision and restraint, and patterns the visitor already knows earn their place.
- Verify by looking at the rendered result at the sizes it ships at, and batch the checks: fix what one look shows before looking again, rather than screenshotting after every tweak.
Setup
- Run
<skill-base-dir>/scripts/impeccable contextonce per session, where<skill-base-dir>is the directory that contains this SKILL.md (the skill folder, not a plugin root two levels above it); keep cwd at the user's project. That base directory resolves every.claude/skills/impeccable/scripts/impeccable <verb>command in this skill and its references, and.claude/skills/impeccable/scriptsis the fallback only when the runtime reports no base directory. On a Windows shell withoutsh, call.claude/skills/impeccable/scripts/impeccable.cmdinstead. The launcher runs a self-contained binary that ships next to it or is downloaded once on first run; no Node or other runtime is required. Pass a named source file or route as--target <path>. It loads PRODUCT.md, DESIGN.md, the matching surface brief, and native-platform guidance when applicable; follow its directives and do not rerun it. - Load the request's playbook: its Commands-table reference for an explicit/implied sub-command, or reference/new-work.md for a new surface or replacement visual world. Inspect target and incumbent visual truth before editing. When the app cannot run, start with committed visual-regression goldens or screenshot fixtures; verify target and freshness against current tokens, CSS, components, or assets, resolve conflicts, and compare theme/variant captures.
- After resolving analysis and direction, read reference/craft-floor.md immediately before any UI edit, including small refinements. It carries the quality floor, the absolute bans, and the reflexes no detector catches. Do not load it for planning-only work.
Launcher unavailable: On refusal or failure, send a separate message before the next tool call: “Context loading did not run; I’ll read the existing project context directly.” Then read existing PRODUCT.md and DESIGN.md without inventing missing context, follow applicable steps 2–3, and continue through permitted tools. This applies to planning and editing; launcher failure alone does not block either.
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.
- agents/impeccable_asset_producer.toml 8.2 KB
- agents/impeccable_documenter.toml 3.1 KB
- agents/impeccable_finish_reviewer.toml 15 KB
- agents/impeccable_manual_edit_applier.toml 6.9 KB
- agents/openai.yaml 236 B
- LICENSE 11 KB
- NOTICE.md 503 B
- reference/adapt.md 11 KB
- reference/adapt.native.md 3.8 KB
- reference/android.md 4.0 KB
- reference/animate.md 5.1 KB
- reference/audit.md 9.0 KB
- reference/audit.native.md 8.1 KB
- reference/bolder.md 3.4 KB
- reference/clarify.md 4.5 KB
- reference/colorize.md 4.4 KB
- reference/component-review.md 7.8 KB
- reference/craft-floor.md 4.4 KB
- reference/craft.md 555 B
- reference/critique.md 45 KB
- reference/degraded/asset-producer.md 8.2 KB
- reference/degraded/documenter.md 3.2 KB
- reference/degraded/finish-reviewer.md 15 KB
- reference/degraded/manual-edit-applier.md 7.0 KB
- reference/delight.md 3.6 KB
- reference/distill.md 5.4 KB
- reference/doctor.md 5.4 KB
- reference/document.md 27 KB
- reference/extract.md 3.3 KB
- reference/generate.md 13 KB
- reference/harden.md 9.1 KB
- reference/hooks.md 14 KB
- reference/init.md 11 KB
- reference/ios.md 3.7 KB
- reference/layout.md 5.0 KB
- reference/live-setup.md 8.0 KB
- reference/live.md 36 KB
- reference/mode-operate.md 4.6 KB
- reference/mode-persuade.md 3.6 KB
- reference/mode-read.md 4.3 KB
- reference/new-work.md 61 KB
- reference/onboard.md 7.5 KB
- reference/operate.md 4.0 KB
- reference/optimize.md 7.4 KB
- reference/overdrive.md 8.8 KB
- reference/polish.md 6.5 KB
- reference/quieter.md 4.8 KB
- reference/region-map.md 3.3 KB
- reference/routing.md 3.3 KB
- reference/shape.md 3.5 KB
- reference/typeset.md 6.1 KB
- reference/visualize.md 14 KB
- reversa-bundle.json 620 B
- scripts/command-metadata.json 8.2 KB
- scripts/data/font-index-failures.json 2.4 KB
- scripts/data/font-index.json 1074 KB
- scripts/impeccable 8.6 KB
- scripts/impeccable.cmd 9.1 KB runs code
- scripts/live-browser-dom.js 12 KB runs code
- scripts/live-browser-ignores.js 10 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.
- today First seen · 88 lines · 131 tokens per session scan A d0adc698e419
impeccable is a skill published in the GitHub repository sandeco/reversa (1,784 stars, last pushed yesterday), licensed MIT. It adds 131 tokens to every session and 2,699 once invoked, about $0.0005 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 2026-10-22.
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