## Summary
Adds the **Stash memory backend** (`memory.backendType=stash`) that
connects Fusion's agent memory to the
[Stash](https://github.com/Fergana-Labs/stash) product — *knowledge
bases for the agent era* ([product site:
joinstash.ai](https://joinstash.ai)). Fusion becomes a first-class Stash
client: complete chat sessions and finished tasks are captured into
Stash, memory is recalled during chat, and Stash sessions are kept in
sync with the dashboard (including deletes and archival).
**Product:** <https://github.com/Fergana-Labs/stash> ·
[joinstash.ai](https://joinstash.ai)
## What's included
### 1. Stash memory backend (RUFU-068 / RUFU-121)
- New `StashMemoryBackend` (`memory.backendType=stash`) with `stashUrl`
/ `stashApiKey` settings (global secrets-store `stash-api-key` +
per-project override).
- **Complete-chat-session capture** keyed by ChatSession id.
- Sessions are classified into **per-project folders** (get-or-create,
`external_key fusion-<projectId>`, 1h per-process cache) and
**soft-deleted with their chat** via `DELETE /api/chat/sessions/:id`.
- Per-conversation **memory-focus** read-time scoping (new
`0066_chat_session_memory_focus.sql` migration — sequence renumbered
0059→0060→0061→0065→0066 as origin/main claimed the lower numbers);
event metadata enriched with `project` / `project_name` / `chat_title`.
- Recall queries normalized to single-keyword / explicit-OR ASCII (≤100
chars); shared normalizer export reused by per-turn recall.
### 2. Per-task executor transcript capture (RUFU-122)
Finished or failed tasks upload their executor transcript
(`agent-log.jsonl`) to Stash as a task session.
### 3. Bulk archive Stash sync (RUFU-125)
Archived task-planner chats soft-delete their Stash sessions on bulk
archival (paged). The snapshot of doomed session ids is taken *before*
the local bulk delete, and the Stash sync runs fire-and-forget so a
Stash stall can never delay local archival.
### 4. Per-chat "Preserve to Stash" backfill (RUFU-136)
A per-chat action that backfills a chat's full history into Stash, with
client-side idempotency and a pre-check that skips already-uploaded
content (fail-closed, no duplicate upload on transport failure).
- **Session-folder naming fix:** the first project folder is now named
"Fusion — <project name>" instead of the bare "Fusion" fallback
(the backfill now resolves the central-registry project name,
best-effort, never blocking the upload).
### 5. Opt-in semantic (vector) recall (RUFU-126)
`stashVectorSearch` setting (default `false` — **zero behavior change
until enabled**). For multi-word queries the backend tries Stash's
semantic-search endpoint first, then falls back byte-identically to the
keyword path. Definitive 404/405/501/503 responses are negatively cached
per process. Requires a patched Stash server (new endpoint +
`sentence-transformers` + embedding backfill); unpatched servers are
transparently bypassed after the first 404.
## Safety
- **Opt-in / inert by default:** the default backend remains `qmd`; the
Stash backend is inert until `memoryBackendType=stash` + `stashUrl` are
set.
- All Stash I/O is **best-effort, fail-closed, and non-blocking** — a
Stash outage never blocks chat, task completion, or archival. No
run-audit content is emitted.
## Testing
- Backfill + delete-sync suites (20/20), Stash backend suite (68/68),
executor memory / session capture suites, `memory-focus-recalling`,
description-guard — all green.
- `tsc` clean across core / engine / dashboard.
- Live verification: bulk backfill of 21/24 chats completed; the
"Preserve to Stash" action is idempotent on re-run.
## Changesets
- `@runfusion/fusion` **minor** — Stash memory backend + capture
(RUFU-068/121), per-task transcript (RUFU-122), bulk archive sync
(RUFU-125), per-chat backfill (RUFU-136), opt-in vector search
(RUFU-126)
- `@runfusion/fusion` **patch** — backfill session-folder naming fix
## Rebase Note (2026-08-23)
Rebased onto `origin/main` `3f448f7292` (v0.77.0-beta.7). Conflicts
resolved additively:
- `packages/core/src/postgres/schema-applier.ts` + test — upstream's
0062-0065 migrations (task/subtask splitting removal, AI merge review
reconciliation, task repository scope, FN-149 review convergence)
unioned with this PR's `chat_sessions.memory_focus` migration, which is
**renumbered 0065 → 0066** (upstream's FN-149 shipped 0065 canonically
on origin/main); `SCHEMA_BASELINE_VERSION` advances to `0066`.
- `packages/dashboard/app/components/ChatView.tsx` — upstream's docked
chat sidebar resize handlers unioned with the RUFU-136 "Preserve to
Stash" backfill handler.
- New commit: `settings.memory.*` stash-backend i18n keys added to all 6
secondary locales (RUFU-121/122 parity fix; `pnpm i18n:status` no longer
reports any violation introduced by this PR).
**Deploy note (operator environments that already ran a pre-rebase build
of this PR):** the memory-focus SQL may already be in the schema under
ledger row `0065`. Remap that row to `0066` (`UPDATE
fusion_schema_migrations SET version = '0066' WHERE version = '0065';`)
*before* first boot of a 0066-ceiling binary — otherwise the fresh
upstream `0065_fn_149_review_convergence_stage.sql` would be skipped as
"already applied". Clean databases (no prior memory-focus row) need no
action.
**CI note — Lint (lifecycle-column census) is red on the merge base:**
`pnpm check:lifecycle-columns --strict` fails identically on pure
`origin/main` `3f448f7292` with
`packages/core/src/db/legacy-adoption.ts: 0 -> 3` (3 column guards in
the U9b legacy-adoption table without a baseline entry or
`DELIBERATE-LITERAL` marker). Verified by running the census on a clean
origin/main checkout — inherited from the base, not introduced by this
PR. Fix belongs upstream; tracked separately.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added Stash memory integration with project configuration and optional
semantic search.
* Added per-chat memory focus controls and a `/focus` command.
* Added “Preserve to Stash” for uploading complete chat history.
* Added automatic chat, task transcript, and completion-event capture.
* Added project-specific Stash session folders and archive/delete
synchronization.
* **Bug Fixes**
* Improved Stash folder naming and handling of missing branches during
no-commit tasks.
* **Documentation**
* Added setup, configuration, integration, vector-search, and
performance guidance.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Fusion <noreply@runfusion.ai>
Co-authored-by: gsxdsm <gsxdsm@users.noreply.github.com>
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