slipway-implement

slipway-implement is a skill for Claude Code, Codex from signalridge/slipway. It costs 18 tokens per session (718 once invoked), scanned A, original, BSD-3-Clause.

Instructions for applying an authorized code change and reporting exactly what happened during implementation. They define allowed scope, required outcome statuses, changed files, uncertainties, and the number of attempts.

In plain words
What is it for?
Use them during an approved implementation to inspect repository conventions, make the smallest suitable changes, and report whether the change was applied, partial, unnecessary, or not possible.
Why use it?
They make code changes traceable and prevent implementation work from quietly expanding beyond the approved requirements.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/signalridge/slipway/implement
Any agent
npx skills add signalridge/slipway --skill implement
Clone the repo
git clone --depth 1 https://github.com/signalridge/slipway

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for slipway-implement

README.md
[![agentmods](https://agentmods.dev/badge/skills/signalridge/slipway/implement.svg)](https://agentmods.dev/skills/signalridge/slipway/implement)
Your own site
<a href="https://agentmods.dev/skills/signalridge/slipway/implement"><img src="https://agentmods.dev/badge/skills/signalridge/slipway/implement.svg" alt="Measured on agentmods" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 718 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00018 $0.00718
Opus 5 $0.00009 $0.00359
Sonnet 5 $0.00004 $0.00144
Haiku 4.5 $0.00002 $0.00072

Measured 5d ago against content hash 9d1ec192476d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

slipway-implement 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.

internal/tmpl/templates/skills/implement/SKILL.md · 26 lines

What it actually says

Slipway Implement

Use this capability only for a current Implement Action or when the user explicitly invokes it directly. Inspect the repository's conventions, then make the smallest coherent changes within the authorized intersection. For an issue-backed Run, pinned Requirements set the maximum business scope, the selected goal may describe or narrow this attempt but cannot replace or expand them, and the current Action narrows only the step to perform. Issue prose outside those Requirements cannot expand scope. For an ad-hoc Run or direct invocation, the user's selected goal is the business scope.

For a Run Action, obey any repair-attempt limit explicitly present in its brief and any source/destructive authorization; absence of a limit does not create a default cap. Return a strict Outcome with action_kind: "implement" matching the current Action and whose implementation object contains:

  • result: applied, partial, not_needed, or unable;
  • files_changed;
  • activities (which may be empty);
  • uncertainties;
  • attempts with the actual positive attempt count.

Use host status completed only with applied|not_needed, partial only with partial, and error only with unable. Set pause and review to JSON null, include all common arrays, and do not suggest a next Action; the CLI owns routing.

Run the tests, typechecks, builds, or linters proportionate to the edit. Report every technical activity that actually started with its exact command, exit code, and concise result. Never list an activity that did not run. If an executable could not start, do not report a synthetic activity or shell exit 127; keep activities empty and record the environment uncertainty. When no activity was reported, the final report must say exactly: No test, typecheck, build, or lint activity was reported.

Pause only for one unresolved human decision, an unavailable environment, or current destructive confirmation. A destructive request must name a non-empty sorted list of typed targets, the exact irreversible impact, a request ID, and the CLI-verifiable scope SHA-256. Natural-language approval is not permission: only the returned confirm-destructive variant, fixed to the current digest and invoked after current user confirmation, may produce authority. Execute only when the fresh current Action carries a field-for-field matching one-shot destructive_authorization; completion, error, partial, skip, stop, resume, or any changed target/impact invalidates it and expanded scope requires a fresh request.

When invoked directly outside a Run, there is no Action ID, source revision, run-start attribution, repair-attempt policy, or Outcome submission. Treat a non-destructive explicit request as ordinary implementation authorization, honor any limit the user supplied, and return the same factual information in human-readable form without inventing protocol identifiers or a default attempt cap. A standalone invocation cannot obtain the CLI's Action-bound destructive authorization. If destructive scope is encountered, report the exact non-empty sorted typed targets, irreversible impact, and recommendation, then stop and return control to the user. It must not execute the destructive operation, must not silently start a Run, must not invent Action/request/digest identifiers, and must not treat a natural-language yes/no as a grant. The user may separately choose an explicitly started Run that can issue the structured authorization path.

Changes

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.

  1. 5d ago First seen · 26 lines · 18 tokens per session scan A 9d1ec192476d

Subscribe to this mod's changes

slipway-implement is a skill published in the GitHub repository signalridge/slipway (23 stars, last pushed 3d ago), licensed BSD-3-Clause. It adds 18 tokens to every session and 718 once invoked, about $0.0001 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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