spek-implement

name	spek-implement
description	Execute an approved Plan to implement the feature.

STOP. Read this before running any command below. A single successful CLI call — including the very first implement new — is NOT task completion. It is not a milestone to report back to the user. It is one step out of many in a workflow that you must keep driving, turn after turn, without stopping, until the CLI itself tells you the workflow is finished. If you find yourself about to say "successfully completed" or summarize results after calling implement new or implement goto even once, you are wrong — go back and read the instruction field you just received, do what it says, and call goto again.

What this skill does

This skill drives a multi-step interactive workflow that executes an approved plan in .spektacular/plans/<name>/plan.md, producing working code, tests, and a changelog. The workflow is owned by the go run . CLI, not by you — the CLI is the state machine and you are the executor.

On each turn, the CLI returns JSON containing an instruction field. That instruction describes exactly one step (e.g. analyze, implement a phase, verify, update changelog, write the test plan, …). You must:

1. Read the instruction carefully.
2. Perform the step — this may mean reading the plan, spawning subagents, editing code, running tests, or writing to the changelog.
3. When the step is complete, run the goto command named at the bottom of the instruction to advance the state machine.
4. Read the next instruction from the new JSON response and repeat.

This is a loop. Do not stop after the first step. Keep looping — step → goto → next instruction → step — until a returned instruction tells you the workflow is finished. Only then should you report completion to the user.

Concretely: do not stop after implement new. That command only starts the workflow — it returns the first instruction, not a finished implementation. Seeing a clean JSON response with no error is not a signal to stop; it is the signal to keep going. Reporting success, summarizing "implementation initialized," or handing control back to the user at this point is the single most common way this skill is executed incorrectly — do not do it.

Reading and writing plan files

The CLI owns the plan documents — plan.md, context.md, and research.md. Never read or write them with the Write, Edit, or Read tools — those bypass Spektacular and the configured plan directory. All plan document access goes through go run . plan file:

• go run . plan file read <name>/<doc>.md — read a plan document from the plan store.
• go run . plan file write <name>/<doc>.md --from <source-path> — write a plan document into the plan store from a source file on disk. Stage the body under .spektacular/tmp/ first, then rm the scratch file after a successful write.

This includes the edits the implement workflow makes to plan.md — ticking phase checkboxes and appending changelog entries. Read the document with plan file read, apply the change, and commit it with plan file write. Never edit a plan document in place with the Edit tool. Path arguments are plan-directory-relative document paths (e.g. my-feature/plan.md).

How to start

Ask the user which plan to implement before proceeding. You don't need to look for an in-progress workflow yourself — the CLI detects and reports one for you (see below).

The plan file must already exist at .spektacular/plans/<plan_name>/plan.md. If it does not, stop and tell the user to run go run . plan first.

Start the implement workflow by running:

go run . implement new --data '{"name": "<plan_name>"}'

If a workflow was interrupted and is still in progress, this command does not start a fresh one. Instead it returns a resume report — a JSON object with "resumable": true plus the in-progress workflow's kind, name, and current_step, and an instruction field — and changes nothing on disk. When you get a resume report:

First check the report's kind. If it is not implement, a different workflow (a spec or plan run) is in progress — you cannot resume it from the implement skill, and the CLI will refuse to. Do not run an implement goto. Instead follow the report's instruction: tell the user a <kind> workflow is in progress and let them choose — continue it with that workflow's skill (go run . <kind> goto), or discard it and start the implement run with go run . implement new --force. Only proceed with the steps below when the report's kind is implement.

1. Ask the user whether to resume the in-progress implement run or start a new one. (The report's instruction field restates both options.)

2. To resume, first read .spektacular/context.md — the git-tracked working-context file the previous session left behind — to recover its learnings and the answers you gave to the user's questions, then run the resume command using the report's current_step:

   go run . implement goto --data '{"step":"<current_step>"}'
   

3. To start fresh (discarding the in-progress workflow — it remains recoverable via git), re-run with --force:

   go run . implement new --force --data '{"name": "<plan_name>"}'
   

Otherwise the command returns the first instruction and a fresh workflow has started. From that point on, follow the loop above: do what the instruction says, then call go run . implement goto --data '{"step":"<next_step>"}' to get the next one. Do not invent step names — every instruction tells you the exact goto command to run next.