F7 [CRITICAL] The round-1 F2(a) fix built ONE alternation regex over all
definition ids (`(id1|id2|...)`). On prefix-chain ids (a, aa, aaa, ...) V8's
regex compiler blows its stack with a fatal, UNCATCHABLE 'RegExpCompiler
Allocation failed' that kills the whole process — strictly worse than the
original per-def thread-hang, and its match cost was still O(text x defs).
Replaced with a single FIXED generic scanner `/\[\^([^\]]+)\]/g` plus a map
lookup in the replacer: genuinely O(total text), no per-document regex
compilation, cannot blow up. Output is identical (only real def ids are inlined).
F8 [WARNING] The frontmatter strip regex was not line-anchored: it closed on the
FIRST `---` anywhere, so a value containing a triple-dash (e.g.
'title: Q1 --- Q2') truncated the frontmatter and leaked the rest into the body.
Replaced with the line-anchored shape the canonical parser already uses
(page-file.ts): open on `---\n`, close on a `\n---` line.
Adds tests: 4000 prefix-chain ids do not crash and stay fast; a frontmatter
value containing '---' is stripped whole.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
agent_coder
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