Danijel Martinek
eadbb7ebd9
Sandcastle re-invokes agents up to maxIterations even when the work is already done — the decomposer was looping 4x re-writing the same epic on every dispatch. Two halves to the fix: - Pass completionSignal: "<promise>COMPLETE</promise>" explicitly on all three run() calls (decompose, implementer, reviewer). Makes the contract visible alongside maxIterations instead of relying on sandcastle's default. - Append a "Signal completion (required)" section to each prompt telling the agent to emit the literal marker as its final line when the work is genuinely done, plus a "do NOT emit if..." list to discourage premature signaling.
.sandcastle/
This directory holds prompt templates that the future orchestrator
(pnpm work dispatch in the sandcastle-dispatch-v1 epic) feeds to
sandcastle when dispatching
agents.
Prompt templates
| File | Role | Variables |
|---|---|---|
prd-eliciter.prompt.md |
Interview a human to produce a PRD draft | {{INITIAL_BRIEF}} |
adr-eliciter.prompt.md |
Interview a human to produce an ADR draft | {{INITIAL_PROPOSAL}} |
decomposer.prompt.md |
Turn a PRD into epic + story files | {{PRD_FILE_CONTENT}} |
implementer.prompt.md |
Execute a single task | {{TASK_FILE_CONTENT}} |
reviewer.prompt.md |
Review the implementer's diff | {{TASK_FILE_CONTENT}}, {{DIFF}} |
Convention: every prompt enforces "generators first"
Each prompt template starts with the same non-negotiable rule: the agent
must prefer pnpm turbo gen <kind> over hand-rolled scaffolding. This
applies to feature packages, events, jobs, realtime channels, optional
core packages, and atomic-design components. Hand-rolled code is only
acceptable when the generator's output doesn't cover the case — and even
then, the agent runs the generator first and modifies its output rather
than starting from scratch.
Environment
Configure runtime tokens via .env (gitignored). Copy .env.example
and fill values for the providers you use.
Build the sandbox image (one-time)
Sandcastle dispatches into a Docker image tagged sandcastle:<root-package-name>.
Build it once per clone before pnpm work dispatch --execute or
pnpm work decompose <id> --execute will work:
pnpm exec sandcastle docker build-image
# Tags: sandcastle:template-vertical
Rebuild after editing this Dockerfile:
pnpm exec sandcastle docker remove-image
pnpm exec sandcastle docker build-image
See docs/guides/runbook.md → Using Sandcastle → Prerequisites for the full setup.
Manual usage
Until the orchestrator ships, these templates are usable manually: copy
the relevant .prompt.md content into a Claude / Codex / other agent
session, fill the {{VARIABLE}} placeholders by hand, and run.