# Bifrost round-trip self-test

How to drive **and** observe a full Tier-3 Bifrost round-trip against
ratatoskr's *own* provider — bind a Worldtree session to our affect/memory
store, fire a turn, and read exactly what Worldtree dispatched to us,
correlated with the turn that triggered it.

This is the **manual form of issue #17** (self-drive + correlated-log
affect/memory ops). Until #17 ships that capability inside the TUI/web/CLI,
this runbook is the reproducible loop — and it is the substrate worldtree-dev's
#296 (salience-algorithm research) and #297 (recall scope/assembly research)
diagnose against.

> First proven by hand 2026-06-16 while isolating #295's recall leg.

## The load-bearing tripwire: which key signs the bind

A bound session-create authenticates as the **Bifrost consumer**, not the
canary client. Worldtree signs the Bifrost handshake JWT with the
**session-create bearer token** (HS256 shared-secret model); our provider
verifies it against `RATATOSKR_HEIMDALL_KEY`.

So the bearer on `POST /sessions` **must be the consumer Heimdall key**
(`RATATOSKR_HEIMDALL_KEY`, in `~/.config/ratatoskr/provider.env`) — **not**
`WORLDTREE_API_KEY` (the mimir/foundational TUI key in `env.sh`). They are two
different keys for two identities of ratatoskr.

| Bearer used on `POST /sessions` | Handshake at our provider |
|---|---|
| `WORLDTREE_API_KEY` (mimir/TUI key) | **401** `bifrost.auth_rejected` → 502 to client |
| `RATATOSKR_HEIMDALL_KEY` (consumer key) | **200 OK** → session bound |

ratatoskr is two identities: the conversation-API **canary client**
(`WORLDTREE_API_KEY`) and the Bifrost **consumer/provider**
(`RATATOSKR_HEIMDALL_KEY`). Self-driving a bound session crosses into the
consumer identity, so it uses the consumer key. #17's Bind half has to carry
this distinction.

## Prereqs

- Provider(s) running on this box (nh3-dev, `10.100.10.50`):
  - memory → `ratatoskr-memory-provider` on `:8391`
  - affect → `ratatoskr-provider` on `:8390`
  - Each is a dev background shell, env-sourced from `provider.env`. The memory
    provider's stdout carries the inbound observe log (`[memory-provider]` lines
    added in `memory_store.py`).
- The provider endpoint is reachable + allowlisted from Worldtree
  (`10.250.50.152`): `http://10.100.10.50:8391`. The allowlist
  (`BIFROST_CLIENT_ALLOWED_HOSTS`) is **Worldtree-side, infra-ops-owned** — if a
  bind 502s with a route/allowlist error, that entry is the thing to check.
- A memory-enabled Tier-3 agent defined on the instance. `ratatoskr:smoke`
  (scope `end_user:smoke-user`) is the standing fixture; it is hidden from
  `GET /agents` (Tier-3 agents are not in the public roster) but resolves on
  session-create.

## Steps

```bash
cd ~/development/ratatoskr
set -a && . ~/.config/ratatoskr/provider.env && set +a   # RATATOSKR_HEIMDALL_KEY etc.
URL=http://10.250.50.152:8081                              # personal Worldtree
HK="$RATATOSKR_HEIMDALL_KEY"                               # the CONSUMER key — the tripwire
```

**1 — Bind a fresh (cold) session to our provider.** `bifrost.endpoint_url`
points at the plane you want (`:8391` memory, `:8390` affect); caps are
negotiated by the handshake, not declared here (`BifrostBindingRequest` is
`{endpoint_url, scope}` only, `additionalProperties:false`). A 201 means the
handshake verified.

```bash
curl -sS -X POST "$URL/sessions" -H "Authorization: Bearer $HK" \
  -H "Content-Type: application/json" \
  -d '{"agent_id":"ratatoskr:smoke","end_user_id":"smoke-user",
       "bifrost":{"endpoint_url":"http://10.100.10.50:8391","scope":null}}'
# -> 201 {"session_id":"...", "kind":"consumer_defined", ...}
```

**2 — Snapshot the fixture** (to detect any promotion the turn writes):

```bash
sqlite3 -readonly memory.db \
  "SELECT chunk_id, json_extract(record_json,'\$.verbatim.text') FROM memory_chunks;"
```

**3 — Fire ONE turn** into the bound session, reusing ratatoskr's own SSE
client (handles composite ids + no-read-timeout). Bearer = the consumer key:

```bash
RATATOSKR_HEIMDALL_KEY="$HK" uv run python - <<'PY'
import asyncio, os, httpx
from ratatoskr.sse_client import stream_turn, Text, Done, Error, Cancelled
SESSION="<session_id from step 1>"
URL="http://10.250.50.152:8081"; KEY=os.environ["RATATOSKR_HEIMDALL_KEY"]
async def main():
    async with httpx.AsyncClient(base_url=URL,
        headers={"Authorization":f"Bearer {KEY}","User-Agent":"ratatoskr-selftest"},
        timeout=httpx.Timeout(connect=10.0,read=None,write=10.0,pool=10.0)) as c:
        async for ev in stream_turn(c, SESSION, "What kind of chocolate do I like?"):
            if isinstance(ev, Done):  print("ANSWER:", ev.response); return
            if isinstance(ev, Error): print("ERROR:", ev.error_code, ev.message); return
asyncio.run(asyncio.wait_for(main(), 150))
PY
```

**4 — Read the inbound pair** from the provider's stdout (the observe brick).
For a background-shell provider, that is the task output file; tail it:

```
[memory-provider] memory-call search REQUEST: scope_all={...} scope_any=[...] top_k=... vec_dim=1024
[memory-provider] memory-call search RESPONSE: N hit(s) [{'chunk_id':..., 'score':..., 'scope':...}]
```

**5 — Re-snapshot the fixture** (step 2's query). A new row = the turn was
promoted (a salience-algorithm event; relevant to #296). Audit, don't blindly
delete — promoted failure-surfaces may be wanted corpus.

## Reading the result

The `search REQUEST` `scope_all`/`scope_any` vs the `search RESPONSE` hit count is
the whole diagnosis surface:

- **0 hits** → the composed v0.6 filter matched no stored chunk. `scope_all` axes
  are AND-matched — an extra axis the chunks don't carry (e.g. `agent_self`) zeroes
  the result even when `end_user` matches. `scope_any` is the OR/union escape hatch:
  a subset-scoped chunk recalls if its scope ⊇ **any one** element. So 0 hits with a
  populated store now means Worldtree sent an over-specified `scope_all` instead of a
  `scope_any` union — a **scope-build** question (Worldtree-side, post-v0.6).
- **Hit present but the model says "no memory"** → we returned it; Worldtree
  dropped it downstream of search → **recall-assembly / injection**
  (Worldtree-side).

Either way our store + search are provable from this surface; the recall
*efficacy* must be judged at the model's answer in a **cold (history-free)**
session, never from a wire 200 (a `search` returns 200 whether or not its hits
are injected).

### Worked example (2026-06-16, #295 → #297)

Cold turn "What kind of chocolate do I like?" against the `smoke-user` fixture:

```
REQUEST:  scope_filter={'end_user': 'smoke-user', 'agent_self': 'ratatoskr:smoke'} top_k=128
RESPONSE: 0 hit(s)
ANSWER:   "I don't have access to your past preferences..."
```

(That capture is the **pre-v0.6 wire** — a single AND-only `scope_filter`.)

Root cause: the recall filter carried `agent_self` but the stored chunks are
`{end_user: smoke-user}` only → the `agent_self` axis excluded all of them.
Branch (a), scope asymmetry — fed to #297.

**Resolution (bifrost 0.8.0 / wire v0.6, #11):** the single `scope_filter` is split
into `scope_all` (AND) + `scope_any` (OR/union). Worldtree can now send the visible
scopes as a `scope_any` union (e.g. `[{end_user: smoke-user}, {end_user: smoke-user,
agent_self: ...}]`), so the subset-scoped chunk recalls via the matching OR member.
Our store implements this at parity with the v0.6 reference; Worldtree **adopted the
v0.6 wire and now emits `scope_any`** on the recall path (#297 client-side union recall
+ #298/#299 bifrost-v0.6 adoption, v0.35.16), so cold cross-session recall is **closed
end-to-end** — pending a live re-smoke against a personal instance running v0.35.16.

## Notes / foot-guns

- **HTTP, not HTTPS.** The spec requires `endpoint_url` be HTTPS; dev is relaxed
  via the Worldtree-side allowlist. Don't "fix" our provider to HTTPS to make a
  bind work — check the allowlist entry first.
- **Cold means cold.** Reuse of a session with history can satisfy a "recall"
  from plain conversation history. Always bind a *fresh* session for a recall
  probe.
- **Stray sessions** created by probes are harmless empty rows on the dev
  instance; no cleanup required.
- This loop is the thing #17 productizes into the chat surfaces; when #17 lands,
  the bind+observe steps move inside the TUI/web/CLI and this runbook becomes the
  underlying contract check.