What is api-route-change?

A set of instructions for changing an HTTP API route served by Decant. An API route is a web address that software calls to request data or perform an action, including its inputs, responses, limits, and live event messages.

Use it when adding, removing, or changing a route, its parameters or status codes, its response format, or its server-sent events.

It keeps the route implementation, documentation, generated API description, user interface callers, and tests in agreement. This helps prevent clients from receiving an undocumented or unexpectedly truncated response.

How dosu-ai/decant configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to dosu-ai/decant. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/dosu-ai/decant/main/.claude/skills/api-route-change/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/dosu-ai/decant

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/dosu-ai/decant/api-route-change/github.svg)](https://agentmods.dev/skills/dosu-ai/decant/api-route-change)

Your own site

<a href="https://agentmods.dev/skills/dosu-ai/decant/api-route-change"><img src="https://agentmods.dev/badge/skills/dosu-ai/decant/api-route-change/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/dosu-ai/decant/api-route-change"><img src="https://agentmods.dev/badge/skills/dosu-ai/decant/api-route-change.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 442 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00069	$0.00442
Opus 5.5	$0.00028	$0.00177
Sonnet 5.5	$0.00014	$0.00088
Haiku 4.5	$0.00007	$0.00044

Measured 28d ago against content hash 2e2e5f26958b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

api-route-change 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 28d 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.

.claude/skills/api-route-change/SKILL.md · 41 lines

What it actually says

Change a serve API route

AGENTS.md invariant 7: the serve routes are a documented local API. These four move together in one change:

The handler and its entry in the route table (src/server/routes.ts), plus the path manifest in src/route-paths.ts.
docs/api/openapi.yaml, the source contract. /api/openapi.json is its runtime representation, so a missing or stale entry is a user-visible bug.
docs/api/routes.md, the prose guide (access control, archive semantics, SSE events).
Contract tests in test/api-contract.test.ts and test/server-routes.test.ts (which pins the route table to the OpenAPI document), plus behavior tests in the relevant test/server*.test.ts file.

Checks before changing semantics

Find every UI caller: grep src/ui/ for the path (views live in src/ui/views/). A new default limit or a narrower response can silently truncate what a page renders.
Keep core modules print-free: the handler shapes HTTP, while queries and stats stay in their modules.
Non-loopback serving needs explicit trusted peers. Host and Origin checks are defense in depth, not authentication; do not weaken either.
No outbound network calls. The only runtime networking is the local server.

Manual smoke

Use a scratch archive and a loopback port:

DECANT_DB=/tmp/decant-api.db bun run src/cli.ts --no-sync serve --no-open --port 43111

Done means bun test, bunx tsc --noEmit, and bunx biome check . pass.

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.

28d ago First seen · 41 lines · 69 tokens per session scan A 2e2e5f26958b

Subscribe to this mod's changes

api-route-change is a skill published in the GitHub repository dosu-ai/decant (72 stars, last pushed today), licensed Apache-2.0. It adds 69 tokens to every session and 442 once invoked, about $0.0003 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 2026-09-30.

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