Harnesses

Minerva discovers sessions by globbing well-known paths under $MINERVA_HOME (default $HOME).

Id	Skills dir	Sessions	Sync
claude	~/.claude/skills	~/.claude/projects/*/*.jsonl	symlink
codex	~/.codex/skills	~/.codex/sessions/**/*.jsonl	symlink
cursor	~/.cursor/skills-cursor	…/agent-transcripts/*/*.jsonl	read-only
opencode	~/.config/opencode/skills	~/.local/share/opencode/storage/session/*/*.json	copy/link
copilot	~/.copilot/skills	~/.copilot/session-state/*	copy/link
gemini	~/.gemini/skills	~/.gemini/tmp/*/chats/*.jsonl, ~/.gemini/antigravity/conversations/*	copy/link
sonar	~/.agents/skills	~/.sonar/logs, sonar.db	skip

Formats

• Claude Code — JSONL with type + message.content[] (tool_use, Skill).
• Cursor — JSONL {role, message.content[]} with tool_use.
• Codex — JSONL session_meta / response_item / event_msg (function_call, mcp_tool_call_end).
• OpenCode — session JSON plus storage/message/<id> and storage/part/<msg> tool/text parts.
• GitHub Copilot — session-state/<id>/events.jsonl (user.message, tool.execution_*) and workspace.yaml.
• Gemini CLI — append-only JSONL: line 1 is {sessionId, startTime}, then {id, type: user|gemini, content, toolCalls[]} records, revisions of the same id, and $set/$push snapshots of messages. Latest revision wins. Legacy .json exports are read too. Workspace is reverse-mapped through ~/.gemini/projects.json.
• Antigravity / sonar — listed when files exist; Antigravity conversations are protobuf and are not decoded.

Unknown line types are ignored. A single corrupt line never fails the file.

Tool categories

Names are normalised (case, -, _) before matching. Gateway-namespaced tools (server__tool, mcp__…) are always mcp. Shell tools also get a command: the leading executable after cd … &&, env prefixes, and wrappers.