React Native Healthkit Contributing

What it does

When your agent uses it

• Changing a HealthKit identifier
• A native (Nitro/Swift) API
• The Expo config plugin
• CI in this repository

Example prompts

• “/react-native-healthkit-contributing”

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

1. 1After changing anything in src/specs/ of either package, or any type they reference (including packages/core/src/types), run bun codegen…
2. 2Before committing, run bun typecheck, bun lint and bun run test until they pass. For Swift changes, also run bun run swiftlint.
3. 3Build the example app with xcodebuild when on macOS (see verify-and-release.md). On Linux you cannot. Say so explicitly instead of…
4. 4Add a changeset for every user-facing feature or fix (bunx changeset), bumping semver correctly.
5. 5Every new export needs three entries
6. 6Look up Apple semantics as Markdown: append .md to any developer.apple.com documentation URL, e.g…
7. 7Match the mapping philosophy: keep names and serialization as close to HealthKit as possible, so Apple's docs keep applying.

What it can do on your machine

Read from SKILL.md and the folder at commit 9e4e186. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • bun
  • expo
  • swift
  • bunx

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Hosts in commands or code, which the agent is likely to contact:

  • developer.apple.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

React Native Healthkit Contributing loads about 1.3k tokens when it runs, and up to ~5.6k if it reads all its reference files. Until then it costs about 128 tokens; SKILL.md has 444 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~128

When it runs · the whole SKILL.md, loaded when a task matches

~1.3k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~5.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from kingstinct/react-native-healthkit at commit 9e4e186, republished under its MIT licence (© kingstinct). 444 words, ~1,315 tokens.

name

react-native-healthkit-contributing

description

How to change the react-native-healthkit monorepo itself (packages/core, packages/react-native-healthkit, packages/health-records, apps/example). Use when adding or changing a HealthKit identifier, a native (Nitro/Swift) API, a hook, the Expo config plugin, codegen, tests or CI in this repository, when nitrogen/codegen or the iOS build fails, or before committing/releasing changes here. For how to *use* the library in an app, see the react-native-healthkit skill instead.

metadata.internal

true

packages/core            @react-native-healthkit/core: shared TS types (src/types), createUnavailableHelpers,
                         Expo plugin building blocks (src/plugin), ReactNativeHealthkitCore pod (ios/):
                         HealthKitStore, Queries, Predicates, Anchors, MetadataSerialization,
                         TypeIdentifiers, BackgroundDeliveryManager, ExceptionCatcher. No Nitro specs.
packages/react-native-healthkit   @kingstinct/react-native-healthkit: Nitro specs (src/specs/*.nitro.ts),
                         Swift impls (ios/*.swift), JS wiring (src/modules.ts, healthkit.ios.ts, healthkit.ts),
                         hooks, SDK-generated identifier types (src/generated, scripts/generate-healthkit*).
packages/health-records  @react-native-healthkit/health-records: one spec (HealthRecordsModule), FHIR types.
apps/example             Expo Router app (prebuild → ios/RNHealthKit.xcworkspace, scheme RNHealthKit),
                         plus contract tests (apps/example/contracts).

© kingstinct, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 4 other files (references) in .agents/skills/react-native-healthkit-contributing of kingstinct/react-native-healthkit.

• SKILL.md
• references/add-identifier.md
• references/add-native-api.md
• references/codegen-troubleshooting.md
• references/verify-and-release.md

Open the folder on GitHubat commit 9e4e186