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Author SHA1 Message Date
dongarandClaude Opus 5.5 d9f2ebd5aa M4.2: the toolchain step
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The preflight becomes the toolchain step (D3, as #135 describes it): a
bounded run of the item's driver model, in a transcript of its own,
that makes the build VM and the project's files agree.

- Started by the harness when the VM isn't set up for the project
  (M4.1's checks): it sets the VM up from the repository and edits
  nothing there (no write_file; anything a command changed is reported,
  left for the work).
- Requested by the driver with toolchain_step(reason) once work is
  agreed: it installs, then brings pins, setup docs and CI
  configuration in step; its edits land in the current milestone. The
  driver gets the step's report as the tool's result, not its turns.
- D1 made structural: until the go-ahead the fast path refuses what it
  knows changes something (and anything dangerous), with a pointer to
  the restatement; unknown commands still go to the classifier, so a
  bug can be reproduced before it's restated.
- A `toolchain` actor and view; the walk asks for steps now and then.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPQ14L3LikyefCMFBqEbKE
2026-10-08 17:37:21 +00:00
dongarandClaude Opus 5.5 9968a0922a M4.1: toolchain preflight
CI / checks (push) Skipped
CI / checks (pull_request) Successful in 2m59s
CI / e2e (pull_request) Successful in 10m33s
A model works out and sets up what a project needs on its build VM;
code makes sure that happens, bounds it and checks the result (D3).

- Before each driver run on a project, one round trip checks the build
  VM: the harness's own baseline (missing: the item waits, a template
  problem), the workspace clone (missing: cloned again and said; the
  item resumes from what it pushed) and a per-project marker.
- No marker (a new project, a new or wiped VM): the item's driver model
  runs a bounded preflight first, with its own prompt, the execution
  tools (screened as ever) and toolchain_ready. The harness runs each
  reported version command itself (version-shaped commands only, even
  from the marker, which the model's commands could edit) and writes
  the marker. Gaps and an unfinished preflight are facts and work goes
  on; the thread hears only of installs and gaps. A rebuilt VM starts
  from the last toolchain.
- Later runs check the versions again; a change is a fact and a thread
  line. The PR body says what the work was tested with.
- A changed host key is its own failure (HostKeyChanged): the item
  waits for the operator's `trust new host key`, which drops the pin;
  then the VM is set up again.
- A prompt line: install what the work needs on the build VM, say why,
  and put lasting needs in the project's own pins.
- tuning.preflight: max_turns, command_timeout_s.
- The property walk gains a VM wipe and ready_before_work (checked
  against a mutant that skips preflight); parked_work_safe accepts that
  a wipe loses what wasn't pushed (D3).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPQ14L3LikyefCMFBqEbKE
2026-10-08 15:43:30 +00:00