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gsxdsm b6ac5f2e51 FN-6608: bound engine verification runs

Add durable engine-level guardrails for verification command timeouts.

- Add project-level verificationCommandTimeoutMs settings plumbing and docs.
- Enforce configured verification budgets and hard caps in executor and merger verification paths.
- Detect marathon verification commands, soft-cap them by default, and require allowFullSuite for explicit full-suite runs.
- Cover timeout defaults, marathon detection, and guidance updates with engine/core tests.

Files changed:
 .changeset/fn-6608-verification-bound.md           |   5 +
 docs/settings-reference.md                         |   1 +
 docs/testing.md                                    |   2 +
 .../src/__tests__/settings-consistency.test.ts     |   5 +
 packages/core/src/agent-prompts.ts                 |   6 +-
 packages/core/src/settings-schema.ts               |   7 +-
 packages/core/src/types.ts                         |   6 +
 .../engine/src/__tests__/executor-core.test.ts     |   3 +
 .../src/__tests__/run-verification-command.test.ts | 176 ++++++++++++++++++++-
 packages/engine/src/executor.ts                    |  11 +-
 packages/engine/src/merger.ts                      |   9 +-
 packages/engine/src/run-verification-tool.ts       | 142 +++++++++++++++--
 packages/engine/src/verification-utils.ts          |  13 +-
 13 files changed, 360 insertions(+), 26 deletions(-)

Fusion-Task-Id: FN-6608
Fusion-Task-Lineage: c593a96d-eb8b-492c-82c7-8943c239f588

2026-06-18 01:27:09 -07:00