/test-claude-locally

name: test-claude-locally
description: Run the Weave router locally in docker compose and drive it with `claude -p` to reproduce and verify routing/translation behavior for a specific upstream model (e.g. GLM-5.1, DeepSeek, Qwen). Use when verifying a router fix end-to-end, reproducing a prod routing bug, confirming a model's streaming behavior (nudges, tool-call suppression, loop/no-progress breaks), or testing a `/force-model` route — without touching the user's global Claude Code config.

--- name: test-claude-locally description: Run the local Docker Compose router with a seeded installation and Claude CLI against real or mock upstreams to verify routing and log behavior. ---

Testing the router locally

> For an **automated** pre-merge regression net (fixture-driven, asserts caching/streaming/decision-headers against real Anthropic), run `make smoke` — see [docs/SMOKE.md](../../../docs/SMOKE.md). This skill is the interactive counterpart: stand the stack up by hand and drive it with `claude -p` to reproduce or verify a one-off bug.

Stand up the router in docker compose, point a one-off `claude -p` session at it via `--settings`, and read the local server logs to confirm behavior. Two upstream modes: the **real** provider API (needs a working key + credits) or a **mock** upstream that emits an exact SSE shape (deterministic, no credits).

Critical gotchas (read first)

• **`~/.claude/settings.json` `env` overrides inherited env vars.** Setting `ANTHROPIC_BASE_URL` in the shell does NOT redirect `claude` — settings.json wins and the request silently goes to prod. Always redirect with `claude --settings <file>` (see `scripts/local-settings.json`). Never edit the user's global `~/.claude.json` or `~/.claude/settings.json` — that breaks their live session.
• **`claude -p` is stateless across invocations.** A standalone `/force-model` call does not persist to the next `claude -p`. Put `/force-model <model>` as the first line of the SAME prompt that contains the task.
• **The router ignores the request's `model` field** and routes via the cluster scorer. The ONLY way to pin a specific model is `/force-model` through a Claude Code session (raw curl cannot).
• **Port 8085 conflict.** The monorepo's pubsub emulator may already own host port 8085. Drop the router's host binding with a `docker-compose.override.yml` (see workflow). The server still reaches the emulator over the compose network.
• **No credits / no key = no reproduction.** If the real upstream returns an error (e.g. OpenRouter "Insufficient credits"), use the mock-upstream path instead.

Workflow

- [ ] 1. Bring up the stack (handle port 8085)
- [ ] 2. Seed an API key
- [ ] 3. Choose upstream: real provider OR mock
- [ ] 4. Write a one-off local-settings.json
- [ ] 5. Drive with `claude -p --settings`, forcing the target model
- [ ] 6. Read local logs to verify behavior
- [ ] 7. Clean up

1. Bring up the stack

cd <router-repo>
# Drop the pubsub host-port binding to avoid an 8085 conflict:
cat > docker-compose.override.yml <<'EOF'
services:
  pubsub-emulator:
    ports: !reset []
EOF
docker compose up -d --build server   # --build picks up code changes
until curl -sf http://localhost:8080/health >/dev/null; do sleep 2; done

The override file is gitignored-by-intent scaffolding — delete it in cleanup.

2. Seed an API key

docker compose run --rm seed

Copy the `rk_...` key it prints.

3. Choose the upstream

**Real provider** — set the provider key in `.env.local` (e.g. `FIREWORKS_API_KEY=...`) and restart `docker compose up -d server`. Confirm the boot log shows `<Provider> provider enabled` with the real base_url. Use this to confirm a model genuinely produces the behavior.

**Mock upstream** — for a deterministic, credit-free repro of a precise SSE shape. Point the provider's base URL at a local mock and restart:

python3 scripts/mock_openai_upstream.py >/tmp/mock.log 2>&1 &   # serves :8099
# In docker-compose.override.yml under `server:`, add:
#   environment:
#     FIREWORKS_BASE_URL: http://host.docker.internal:8099/v1
#     FIREWORKS_API_KEY: sk-mock
#   extra_hosts: ["host.docker.internal:host-gateway"]
docker compose up -d server

Edit the mock's emitted chunks to match the upstream shape you're reproducing. Provider→env-var names live in `internal/providers/provider.go`; base-URL overrides are read in `cmd/router/main.go` (`<PROVIDER>_BASE_URL`).

4. One-off local settings

cat > /tmp/local-settings.json <<EOF
{ "env": {
  "ANTHROPIC_BASE_URL": "http://localhost:8080",
  "ANTHROPIC_CUSTOM_HEADERS": "X-Weave-Router-Key: rk_REPLACE_ME"
}}
EOF

5. Drive it

cd <scratch-dir-with-files-to-act-on>
env -u CLAUDE_CODE_SESSION_ID -u ANTHROPIC_BASE_URL -u ANTHROPIC_CUSTOM_HEADERS \
  claude -p 'First send exactly: /force-model z-ai/glm-5.1
Then <task that requires tool use>, then stop.' \
  --settings /tmp/local-settings.json --max-turns 10 --verbose

6. Verify via logs

The decision + completion log per action (one `ProxyMessages complete`) carries the signals you need. Strip ANSI first:

docker compose logs server --since=3m 2>&1 | sed -E 's/\x1b\[[0-9;]*m//g' \
  | grep 'ProxyMessages complete' | grep 'decision_model=z-ai/glm-5.1'

Useful fields: `decision_model`, `decision_provider`, `upstream_finish_reason`, `suppressed_tool_calls`, `text_only_turn_nudged`, `tool_use_blocks`, `resp_stop_reason`, `stop_reason_demoted`. Also grep for `recovery nudge`, `tool-call loop`, `no-progress`.

**Confirm the model was actually served** before drawing conclusions:

docker compose logs server --since=3m 2>&1 | sed -E 's/\x1b\[[0-9;]*m//g' \
  | grep 'ProxyMessages complete' | grep -oE 'decision_model=[^ ]+' | sort | uniq -c

If you only see other models, `/force-model` didn't take — recheck step 5.

7. Clean up

pkill -f mock_openai_upstream.py 2>/dev/null
rm -f docker-compose.override.yml /tmp/lo