chore(openspec): drop 9 superseded proposals + 11 stub archive files

Drop 9 batch proposals that are superseded by the boocode-lift-analysis
(boocontext-audit, conductor upgrades, self-healing/verify-gate skills):
add-3tier-memory, import-llm-evaluator, import-pregel-engine, plugin-platform,
conductor-evolution, code-intelligence-upgrade, dev-workflow, ui-overhaul,
agent-reliability.

Delete 11 stub archive files (49-66B each, 'Status: Shipped. Archived.' only)
that provide zero documentation value over the existing CHANGELOG.md + git tags.

openspec/changes/memory-context/proposal.md

@@ -0,0 +1,29 @@
+## Why
+
+BooCode agents lose all context between sessions and have no long-term memory. The 3-tier memory (Context→Daily→Core) provides cross-session persistence. Combined with context compression (DCP-style pruning) for tighter context windows, boulder state for work tracking across sessions, and a System Context model for typed context sources, this gives BooCode persistent agent intelligence.
+
+## What Changes
+
+- Port memory_engine 3-tier memory to TypeScript (ContextTier + DailyTier + CoreTier)
+- Implement ContextTier: token-budget conversation summarization with RunningSummary
+- Implement DailyTier: Markdown-file-based daily records with lazy creation
+- Implement CoreTier: SQLite FTS5 + vector BLOB storage with hybrid search (vector 0.7 + keyword 0.3)
+- Implement Deep Dream consolidation: overnight LLM rewrite of long-term memory
+- Add manage-memory and search-memory tools for agents
+- Add context compression from opencode-dynamic-context-pruning (range/message dedup, purge errors, turn protection)
+- Add boulder state from oh-my-openagent (cross-session plan execution with auto-resumption)
+- Add System Context model from opencode (typed context sources, immutable epoch baselines, reconciliation)
+- Add SWR stale-while-revalidate caching for codecontext/boocontext tool results
+
+## Capabilities
+
+### New Capabilities
+- `context-tier`: Token-budget conversation summarization
+- `daily-tier`: Markdown-file-based daily memory records
+- `core-tier`: SQLite FTS5 + vector hybrid search long-term memory
+- `deep-dream`: Overnight LLM-based memory consolidation
+- `memory-tools`: Agent-accessible manage/search memory tools
+- `context-compression`: Range/message dedup, purge errors, turn protection
+- `boulder-state`: Cross-session plan execution with auto-resumption
+- `system-context`: Typed context sources with epoch baselines
+- `swr-caching`: Stale-while-revalidate for MCP tool results