_Kerman
ad83cce36a
* fix(session): repair interrupted turns during V3 migration * docs(session-format-v3-to-v4): state reference remapping in the summary and code The frontmatter summary still promised preserved references after the edge began remapping audited same-artifact references around an inserted interrupted turn/end. Two local comments record why the opaque branch moves only `seq` and why the open-step flag needs no reset at a turn boundary. * docs(session-format-catalog): describe the V3-to-V4 edge as a converting link The catalog listed the edge as an identity conversion, which stopped being true once it inserted an evidenced interrupted turn/end and remapped the audited local references that follow.
description, kind
| description | kind |
|---|---|
| Package map for the durable session data plane: the persistence seam and its backends, checkpoint policy, projections, log-backed titles, and outbound session telemetry. | package-group |
session/ — durable session data plane
English | 中文
Summary
The session group keeps conversations durable, restores released log formats, and makes committed history available after restart. Its storage and checkpoint packages protect requests, tool side effects, and completed steps; projection packages derive client-ready values; title packages name sessions; telemetry packages report activity. Start with the shipped JSONL storage, then add checkpointing and only the projections, title policy, or telemetry your deployment needs. Each package README owns its guarantees and configuration, while a sibling query group provides independent read and tool access.
Table of Contents
Packages
The group splits into four families: durable storage (persistence seam, backends, checkpoint policy), projections, titles, and telemetry. Each package README owns its contract and configuration.
Persistence
| Package | Role | ctx key |
|---|---|---|
session-format/ |
Pure adjacent-format chain and artifact validation library | library — no ctx key |
session-format-v0-to-v1/ |
Frozen released-v0 decoder and identity migration into released v1 | library — no ctx key |
session-format-v1-to-v2/ |
Frozen released-v1 decoder and cardinality-changing Assistant-stream migration into released v2 | library — no ctx key |
session-format-v2-to-v3/ |
Frozen V2 decoder and system-prompt, envelope, and PTC migration into V3 | library — no ctx key |
session-format-v3-to-v4/ |
V3 identity migration and V4 codec with generation-aware delivery validation | library — no ctx key |
session-format-catalog/ |
Generated static catalog of shipped adjacent migrations | library — no ctx key |
session-persistence/ |
Defines the durable session-storage service and the shared write coordination every backend composes | ctx.sessionPersistence |
session-persistence-jsonl/ |
Shipped backend: immutable canonical generation filenames per Session with exclusive successor publication, optionally Zstandard-compressed | registers on ctx.sessionPersistence |
session-checkpoint-policy/ |
Makes model requests, top-level tool side effects, and completed steps durable before the next action | wraps ctx.llm and ctx.tools |
session-log-deepseek/ |
Uploads the incremental canonical log as optional official DeepSeek request metadata | contributes dsh_session_log |
Projection
| Package | Role | ctx key |
|---|---|---|
session-projection/ |
Defines and drives projection units that fold committed events into whole current values | ctx.sessionProjections |
session-projection-cache/ |
Persists projection checkpoints so cold reads skip full log loads | ctx.sessionProjectionCache |
session-stats/ |
Serves whole-log conversation counts and wall times through the sessionStats unit |
registers on ctx.sessionProjections |
session-turn-outline/ |
Serves the whole-log turn outline (turn, turn/start seq, prompt preview) through the turnOutline unit |
registers on ctx.sessionProjections |
Titles
| Package | Role | ctx key |
|---|---|---|
session-title/ |
Log-backed session titles with a deterministic fallback and one optional provider | ctx.sessionTitle |
session-title-llm/ |
Shared model-backed title-generation policy for the provider packages | library — no ctx key |
session-title-first-prompt-llm/ |
Titles a session from its first eligible human message | registers on ctx.sessionTitle |
session-title-all-prompts-llm/ |
Titles a session from all eligible human messages | registers on ctx.sessionTitle |
Telemetry
| Package | Role | ctx key |
|---|---|---|
session-telemetry/ |
Captures session activity and hands records to a configured reporting backend | ctx.sessionTelemetry |
session-telemetry-otel/ |
Delivers telemetry through OpenTelemetry logs in FEEDBACK_ONLY or DISABLED mode |
registers on ctx.sessionTelemetry |
Only one title provider may register at a time; without one, the title service keeps its deterministic fallback. The subsystem pages below are the backend-neutral references for each family.
Related documentation
- Session persistence subsystem — backend-neutral service semantics, the flush checkpoint, and crash recovery.
- Session projections subsystem — the projection unit contract and drive semantics.
- Session titles subsystem — title eligibility, fallback, and provider flow.
- Session telemetry subsystem — capture, redaction, and delivery modes.
- Session subsystem — the live event log every package in this group persists or derives from.
Dev Note
None.