Introduces KNOWN_TEMPLATE_DEFAULTS and KNOWN_STATUS_PATTERNS in state-document.cjs
to enumerate every string a GSD handler writes. stateReplaceFieldIfTemplate
consults this table and only replaces the field when the existing value is a known
template default (or absent) — executor-authored values are left untouched.
Wire-in:
- record-session: Resume File now only overwritten when caller passes --resume-file
OR existing value is 'None'. Router no longer defaults resume_file to 'None'
before calling the handler.
- advance-plan (both branches): Status and Last Activity guarded via
stateReplaceFieldIfTemplate.
- updateCurrentPositionFields: Status and Last activity in the Current Position
section guarded; bare ISO date shape is the trigger for replacement, prose
narrative is preserved.
- planned-phase: Status and Last Activity guarded the same way.
Regression tests (7 cases) in tests/bug-397-state-preserve-executor-authored.test.cjs
cover each data-loss shape; all 106 existing state.test.cjs tests still pass.
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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