Make Codex learn from work it can prove.

Crucible is a Codex plugin for work that has to survive checks. Codex selects the recipe. Crucible writes the artifact. The verifier decides what is worth keeping.

Crucible benchmark showing lower fresh input and billable proxy than raw Codex.

Install it where Codex already works.

codex plugin marketplace add dunkeln/crucible
Crucible installed in the Codex plugin marketplace.

Crucible turns checked work into reusable signal.

Every run leaves a trail: what changed, what proved it, and what is worth carrying forward. That is loop engineering.

  1. attemptCodex changes the project.
  2. proofCrucible runs the check.
  3. rewardThe result becomes signal.
  4. promote the pattern

Codex gets a stable factory.

  • Codex chooses.

    A recipe, a seam, a next move.

  • Crucible writes.

    The repeatable shape around the work.

  • Verifier decides.

    Only checked behavior moves forward.

The cost story appears on the second turn.

Same loose follow-up task. Same model. One arm gets a plain folder. One arm gets a locked pack with evidence already in place.

-54%
fresh input
-50%
billable proxy
100%
verifier pass