next-decimal and insert-phase only scanned directory names in
.planning/phases/ when calculating the next available decimal number.
When agents added backlog items by writing ROADMAP.md entries and
creating directories without calling next-decimal, the function would
not see those entries and return a number that was already in use.
Both functions now union directory names AND ROADMAP.md phase headers
(e.g. ### Phase 999.3: ...) before computing max + 1. This follows the
same pattern already used by cmdPhaseComplete (lines 791-834) which
scans ROADMAP.md as a fallback for phases defined but not yet
scaffolded to disk.
Additional hardening:
- Use escapeRegex() on normalized phase names in regex construction
- Support optional project-code prefix in directory pattern matching
- Handle edge cases: missing ROADMAP.md, empty/missing phases dir,
leading-zero padded phase numbers in ROADMAP.md
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
