feat: add conversation import system for extracting knowledge from prior AI agent history

[BYK]

Summary

• Adds a pluggable conversation import system that detects and extracts long-term knowledge from 7 external AI coding agents: Claude Code, Codex, OpenCode, Cline, Continue, Pi, and Aider
• Introduces lore import CLI command and auto-detection in lore run for fresh projects
• Refactors curator parseOps/applyOps into shared helpers reused by the import extraction pipeline

Details

Architecture

The import system lives in packages/core/src/import/ with a clean layered design:

1. Provider interface (AgentHistoryProvider) — each agent implements detect(projectPath) and readChunks(projectPath, sessionIds)
2. Detection orchestrator — scans all registered providers, returns results sorted by richness
3. Knowledge extraction — feeds conversation chunks to the curator LLM sequentially, with dedup via existing entries
4. Idempotency — import_history table (DB migration v19) tracks imported sources by hash to prevent re-importing

Providers

Provider	Source	Format	Project Matching
Claude Code	~/.claude/projects/<mangled>/*.jsonl	JSONL	Path-mangled directory
Codex	~/.codex/sessions/YYYY/MM/DD/*.jsonl	JSONL	cwd in session_meta
OpenCode	~/.local/share/opencode/opencode.db	SQLite (read-only)	worktree in project table
Cline	VS Code globalStorage /tasks/<id>/	JSON (Anthropic MessageParam[])	cwdOnTaskInitialization
Continue	~/.continue/sessions/<id>.json	JSON	workspaceDirectory
Pi	~/.pi/agent/sessions/<encoded-cwd>/*.jsonl	JSONL (tree-structured)	CWD-encoded directory
Aider	<project>/.aider.chat.history.md	Markdown	Per-project file

CLI

lore import                          # Detect + import interactively
lore import --dry-run                # Show what would be imported
lore import --agent claude-code      # Import from specific agent
lore import --yes                    # Skip confirmation

Auto-detection (lore run)

On fresh projects (no existing knowledge/temporal data), lore run checks for prior conversations before launching the agent. If found, prompts the user once and runs import in the background. Declined imports are recorded so we don't ask again.

Curator refactor

Extracted parseOps() and applyOps() from curator.ts into exported shared helpers. Both the live curator and the import system use them — zero behavior change for existing code paths.

Testing

83 new tests across 10 files covering:

• All 7 providers (detection, parsing, chunking, edge cases)
• Detection orchestrator (aggregation, error handling, sorting)
• Import history (idempotency, declined state, hash computation)
• Knowledge extraction (mocked LLM, sequential processing, progress callbacks)
• Curator ops (parseOps, applyOps create/update/delete/truncate/skipCreate)

Related

• Explore Windsurf and Cursor support (gateway proxy + conversation import) #251 — Explore Windsurf and Cursor support (filed as follow-up)