v0.4.0

What's Changed

• fix: normalize Claude agent guide imports by @ashtom in #102
• fix: keep --head source output on the committed tree by @ashtom in #99
• refactor: drop the on-disk line-reader shims from production code by @ashtom in #107
• feat: report explain's source view in the JSON answer by @ashtom in #106
• fix: make ShowFileLimited's ceiling hold when the probe is silent by @ashtom in #108
• fix: validate init-agents markers before writes by @ashtom in #105
• docs: clarify index cache variants by @ashtom in #109
• fix(sem): key both caches on the resolved file cap, not the raw option by @ashtom in #110
• feat(search): prose retrieval by section, with the benchmark kit that measures it by @suhaanthayyil in #104
• release: statically link Windows archives by @ashtom in #111
• fix: explain high-score confidence warnings by @ashtom in #112
• feat: prose retrieval + benchmark kit, README and docs refresh by @ashtom in #113
• Revise README for clarity and issue reporting by @ashtom in #115
• docs(readme): restore the LoCoMo table into the root README by @suhaanthayyil in #117
• release: prepare v0.4.0 by @ashtom in #116

Full Changelog: v0.3.0...v0.4.0