v0.25.0

What's Changed

• docs: refresh repository memory gotchas by @narumiruna in #309
• fix(pi-subagents): avoid reflexive detached waits by @narumiruna in #313
• fix(pi-sync): make corrupt lock recovery race-safe by @narumiruna in #312
• fix(pi-subagents): keep reviewer verification lightweight by @narumiruna in #315
• feat(btw): add ephemeral follow-up threads by @narumiruna in #311
• fix(btw): preserve side thread layout during reflow by @narumiruna in #317
• feat: add multi-provider usage extension by @narumiruna in #314
• feat(pi-worktree): add safe worktree management by @narumiruna in #316
• feat(codex-usage): add pi-usage migration warning by @narumiruna in #318
• docs: record extension README conventions by @narumiruna in #319
• docs: align extension README structure by @narumiruna in #320

Full Changelog: v0.24.0...v0.25.0