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Operator: "first turn double prints agent's turn." Root cause: v0.8.1 wrote both the streamed Text lines AND the post- Done `Markdown(event.response)` body into the transcript. Same content rendered twice — once as plain streaming, once as a full markdown re-render. The v0.8.1 commit message documented this as "some duplication is acceptable" but the live UX read as a bug. ## Fix Drop the post-Done `Rule + Markdown(response)` writes in non-raw mode. The streamed text IS the response; whatever the model emitted flows into the transcript line-by-line via coalesce-on-newline. Markdown formatting (bold, lists, code blocks) renders as plain text — a known regression from v0.8.1's polished output but the right tradeoff vs the duplication bug. ## What this loses temporarily Pre-v0.8.2 (after Done): [done] turn_id=... ─── ─── (Rule separator) ─── **Bold text** rendered bold, `code` highlighted, lists as bullets, etc. v0.8.2 (after Done): [done] turn_id=... ─── **Bold text** as plain asterisks, `code` as backticks, lists as plain dashes ## v0.9.0 plan Restore markdown rendering via LIVE rendering during the stream (not post-Done re-render). Replace `RichLog#transcript` with a `VerticalScroll` container that mounts a fresh `Markdown` widget per turn; Text deltas update the widget; markdown renders as content arrives. No duplication, no snap, full formatting. Operator-confirmed direction (2026-05-25 AskUserQuestion). ## Tests 287/287 GREEN; ruff clean. Two tests updated for the new shape: - test_done_renders_markdown_after_label → renamed test_done_flushes_tail_and_writes_label; asserts NO Markdown, NO Rule (post-Done) in the writes. - test_happy_text_done_renders_markdown → renamed test_happy_text_done_no_double_print; asserts NO Markdown in the spy. Patch bump (v0.8.1 → v0.8.2): bug fix; no public API change.
Ratatoskr
A Worldtree Conversation API debug TUI. Runs up and down Worldtree's API surface — sessions, turns, persona, tools, admin events, Bifrost state — carrying messages between layers. Like the squirrel.
The product is the observability surface; chat is the input mechanism. Devs run Ratatoskr against a local Worldtree to watch a turn flow through every layer of the system, side-by-side, in one terminal.
Status
v0 scaffold. Design locked; implementation hasn't started. The dev team owns the implementation pass.
Read in this order
docs/design-brief.md— the locked design. Read this first. Every architectural decision is recorded with its rationale, the alternatives considered, and (where relevant) the operator's lock-in moment.docs/SPEC-PIN.md— what Worldtree spec version Ratatoskr is built against, where the vendored snapshot lives, and how to bump the pin.docs/conversation-api-spec.md— the vendored Worldtree spec snapshot. Read this to understand the API surface Ratatoskr consumes. Do not import anything from a Worldtree checkout — the boundary is the spec, not the code. Seedocs/design-brief.md§2.CLAUDE.md— Claude Code conventions for this repo (mostly inherited from the Corviduo template).persistent-memory.md— durable intent across context resets. Update as decisions and state evolve.
Quickstart
# 1. Environment
uv venv && source .venv/bin/activate
uv pip install -e ".[dev]"
# 2. Verify the spec pin
cat docs/SPEC-PIN.md # documented Worldtree SHA + bump procedure
# 3. Tests (none yet; scaffold only)
uv run pytest
# 4. Run against a local Worldtree (once implementation lands)
# Worldtree must be running: python -m core.conversation_api
ratatoskr --agent mimir
What this repo is NOT
- NOT a polished consumer for Worldtree's end-users — that's the web app.
- NOT a Worldtree admin tool — admin CLI is separate (
sessions_cli.pylives in Worldtree). - NOT a featuretracking shadow of the web app — when the Conversation API surface grows, Ratatoskr does not necessarily grow with it.
- NOT a remote-Worldtree debug client — file-tail surfaces (persona log, server log) assume local-dev posture.
The full negative-clause list lives in docs/design-brief.md §6.
Boundary rule
Ratatoskr depends on three things only:
httpx+httpx-sse(network layer)textual(TUI framework)- Worldtree's published Conversation API spec at the pinned SHA
Hard rule: no imports from a Worldtree checkout. No core.* imports,
no from worldtree.*, no shared models, no submodule of Worldtree. The
spec is the entire surface. Boundary smoke test at tests/test_no_worldtree_imports.py
enforces this in CI.
Version-skew strategy
The dev team is decoupled from Worldtree's dev team. To detect drift when Worldtree changes the API:
- Spec-version pin in
pyproject.toml(worldtree-spec-rev). Bump explicitly; bumps are a tracked action. - Recorded-SSE snapshot tests at
tests/snapshots/. Captured against a live Worldtree; replayed in CI. Re-record after every pin bump. - Conformance smoke test — boots Worldtree via Docker compose in CI, runs a one-turn happy path. Catches integration-level drift.
See docs/SPEC-PIN.md for the bump procedure.
Consumer-side discoveries
If you find a spec gap, ambiguity, or missing-but-needed endpoint while working on Ratatoskr: route the discovery back to worldtree-dev via althing rather than via PR on Worldtree directly. The separate-team boundary is intentional and helps catch spec gaps that an in-tree consumer would paper over.
Related repos
- Worldtree — the API Ratatoskr consumes
- brokkr-smithy — authored this design brief
- Skaldsong — another Worldtree API consumer (Python; render-and-aggregate pattern)
- mead-hall — another Worldtree API consumer (TypeScript; server-side broker)