v1.5.0

Local-first persistent memory for OpenCode — decay fix, provenance, contradiction lifecycle, memory tiers, hybrid retrieval, per-fact privacy and an evaluation suite.

What's new in 1.5.0

• Decay fix: time-based decay now applies exactly once in score() (from lastSeen); weight is a static importance baseline, so forgetting no longer depends on how often pruning runs.
• Provenance: dreamed facts record their source session, messages, extraction time and confidence; new memory_why tool audits where a memory comes from and why it ranks where it does.
• Contradiction lifecycle: conflicting explicit facts are flagged CONFLICTED (never silently overwritten) and resolved via memory_update/memory_write; replaced dreamed facts become SUPERSEDED tombstones.
• Memory tiers: core (always surfaced) / archival (on relevance) / temporary (auto-expiry) / pinned (never decays), with automatic v1 → v2 store migration.
• Hybrid retrieval: lexical pipeline (scope filter + bilingual keyword expansion + time score) with optional semantic reranking stage (OPENCODE_MEMORY_RERANK=1); off-topic queries surface only the core slot.
• Retrieval feedback: memory_useful / memory_irrelevant tune ranking from real usage.
• Per-memory privacy: sensitivity: "local-only" facts never leave the machine — not surfaced to providers, not sent during consolidation.
• Memory Inspector: /memory with stats, conflicts, project scope and "why was this surfaced" breakdown.
• Evaluation suite: bun run bench — 90 scenarios across 13 failure modes (paraphrase, IT/EN cross-language, synonyms, distractors, contradictions, duplicates, isolation, obsolete, false positives, none, feedback, multi-expected).

Benchmark (lexical pipeline, suite of 90)

Recall@5:         100.0%
MRR (first hit):    95.0%
False-surface rate:  0.0%
Context overhead:   13.8 tokens/query

Install: add @cioffi_ai/opencode-memory to plugin in ~/.config/opencode/opencode.json(c) (or update your cached version to 1.5.0).