mirror of
https://github.com/getcompanion-ai/co-mono.git
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989af79752
pi-ai: - Fixed usage.input to exclude cached tokens for OpenAI providers - Previously input included cached tokens, causing double-counting - Now input + output + cacheRead + cacheWrite correctly gives total context coding-agent: - Session header now includes branchedFrom field for branched sessions - Updated compaction.md with refined implementation plan - Updated session.md with branchedFrom documentation
86 lines
3 KiB
Markdown
86 lines
3 KiB
Markdown
# Session File Format
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Sessions are stored as JSONL (JSON Lines) files. Each line is a JSON object with a `type` field.
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## File Location
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```
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~/.pi/agent/sessions/--<path>--/<timestamp>_<uuid>.jsonl
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```
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Where `<path>` is the working directory with `/` replaced by `-`.
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## Type Definitions
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- [`src/session-manager.ts`](../src/session-manager.ts) - Session entry types (`SessionHeader`, `SessionMessageEntry`, etc.)
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- [`packages/agent/src/types.ts`](../../agent/src/types.ts) - `AppMessage`, `Attachment`, `ThinkingLevel`
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- [`packages/ai/src/types.ts`](../../ai/src/types.ts) - `UserMessage`, `AssistantMessage`, `ToolResultMessage`, `Usage`, `ToolCall`
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## Entry Types
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### SessionHeader
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First line of the file. Defines session metadata.
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```json
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{"type":"session","id":"uuid","timestamp":"2024-12-03T14:00:00.000Z","cwd":"/path/to/project","provider":"anthropic","modelId":"claude-sonnet-4-5","thinkingLevel":"off"}
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```
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For branched sessions, includes the source session path:
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```json
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{"type":"session","id":"uuid","timestamp":"2024-12-03T14:00:00.000Z","cwd":"/path/to/project","provider":"anthropic","modelId":"claude-sonnet-4-5","thinkingLevel":"off","branchedFrom":"/path/to/original/session.jsonl"}
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```
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### SessionMessageEntry
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A message in the conversation. The `message` field contains an `AppMessage` (see [rpc.md](./rpc.md#message-types)).
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```json
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{"type":"message","timestamp":"2024-12-03T14:00:01.000Z","message":{"role":"user","content":"Hello","timestamp":1733234567890}}
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{"type":"message","timestamp":"2024-12-03T14:00:02.000Z","message":{"role":"assistant","content":[{"type":"text","text":"Hi!"}],"api":"anthropic-messages","provider":"anthropic","model":"claude-sonnet-4-5","usage":{...},"stopReason":"stop","timestamp":1733234567891}}
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{"type":"message","timestamp":"2024-12-03T14:00:03.000Z","message":{"role":"toolResult","toolCallId":"call_123","toolName":"bash","content":[{"type":"text","text":"output"}],"isError":false,"timestamp":1733234567900}}
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```
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### ModelChangeEntry
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Emitted when the user switches models mid-session.
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```json
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{"type":"model_change","timestamp":"2024-12-03T14:05:00.000Z","provider":"openai","modelId":"gpt-4o"}
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```
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### ThinkingLevelChangeEntry
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Emitted when the user changes the thinking/reasoning level.
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```json
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{"type":"thinking_level_change","timestamp":"2024-12-03T14:06:00.000Z","thinkingLevel":"high"}
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```
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## Parsing Example
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```typescript
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import { readFileSync } from "fs";
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const lines = readFileSync("session.jsonl", "utf8").trim().split("\n");
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for (const line of lines) {
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const entry = JSON.parse(line);
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switch (entry.type) {
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case "session":
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console.log(`Session: ${entry.id}, Model: ${entry.provider}/${entry.modelId}`);
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break;
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case "message":
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console.log(`${entry.message.role}: ${JSON.stringify(entry.message.content)}`);
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break;
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case "model_change":
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console.log(`Switched to: ${entry.provider}/${entry.modelId}`);
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break;
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case "thinking_level_change":
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console.log(`Thinking: ${entry.thinkingLevel}`);
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break;
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}
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}
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```
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