fusion

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gsxdsm d9a518c0b0 FN-7200: shorten fast planning prompt

Shortens fast-mode planning while preserving workflow seam routing.

- Replace the verbose built-in fast triage prompt with a lean speed-first PROMPT.md template.
- Assert the fast prompt remains much shorter than standard planning while retaining required gates.
- Cover selected workflow planning-fast overrides and built-in fallback behavior.
- Add a minor changeset for the published CLI package.

Files changed:
 .changeset/FN-7200-fast-planning-prompt.md         |   7 +
 packages/core/src/__tests__/agent-prompts.test.ts  |  11 +-
 packages/core/src/agent-prompts.ts                 | 227 +++++----------------
 .../triage-fast-mode-workflow-variant.test.ts      |  35 +++-
 4 files changed, 98 insertions(+), 182 deletions(-)

Fusion-Task-Id: FN-7200

Fusion-Task-Lineage: cbfd7ed8-163d-4ae5-8c25-873a1b4ed669

Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>

2026-06-28 12:24:38 -07:00