Generate a functional-requirements spec (`.3tg.md`) scoped to a single exported function or React component. Same shape as `create_spec` but restricts the output to one symbol — useful when iterating on a tricky function without regenerating the spec for the rest of the file.
IMPORTANT — never hand-author a `.3tg.md` yourself. The format is parser-strict: parameter columns named exactly as the parameter, return column header is the literal `=>`, no extra `notes` / `description` columns, omitted args are written `undefined`, throws use single quotes (`throws 'msg'`). Always call this tool to emit the scaffold; the user can then edit rows.
Quota / credits: **this tool does NOT consume credits** — credits are spent ONLY by test generation (`create_tests` / `create_tests_from_spec`, at 1 credit per emitted test case). Spec generation is free.
CRITICAL POST-CALL ACTION — write returned files to disk:
The MCP server does NOT touch the user's filesystem. It returns the generated file CONTENTS in the response's `files` array. After this tool returns, you MUST iterate over `files` and write each entry's `content` verbatim to its `path` using your native file-write capability (e.g. Write / edit_file / create_file — whatever your client exposes). Create parent directories as needed.
Returned paths are project-root-relative and already translated to the `.3tg/` mirror convention where applicable (e.g. specs land under `.3tg/<source-path>.3tg.md`; tests / mocks travel through unchanged). Write each path verbatim.
Do NOT claim "Generated test file: <path>" unless you have actually written the file. The user will assume the MCP wrote it and waste time looking for a non-existent file. If you can't write for some reason (permission denied, no write capability in this client), return the contents inline in your message so the user can copy-paste them. Never report success silently when the write didn't happen.
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