## Summary
Smoke-testing the just-shipped 0.47.1 against production exposed two regressions:
1. `agnes query --remote "SELECT FROM unit_economics WHERE bad_col=1"` returned `Table "unit_economics" must be qualified` (the OLD error) instead of `Unrecognized name: bad_col` (the #218 fix's intended behavior).
2. `agnes query "DESCRIBE unit_economics"` showed only DuckDB's misleading `Did you mean order_economics?` with no Agnes hint paragraph (the #219 fix is missing).
Root cause: PR #217's squash merge (`506a378c`) carried stale snapshots of `app/api/query.py` and `cli/commands/query.py` from before #218 and #219 merged. The rebase-and-merge auto-merged those files cleanly (no conflict markers) but the result silently reverted both fixes.
Restore the two changes verbatim. Tests for both fixes already on main and continue to pass against the restored code.
## Test plan
- [x] `pytest tests/test_api_query_guardrail.py tests/test_cli_query.py` — clean
- [x] Manual repro against prod after deploy: both flows now surface the intended diagnostic.
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## Summary
Brings the Keboola connector to feature parity with the legacy internal data-analyst's per-table sync strategies. Closes the four documented gaps from the spec branch (`zs/keboola-connector-specs`):
- **Typed parquet** in the legacy SDK extraction path — column types from Keboola Storage metadata (provider cascade `user > ai-metadata-enrichment > keboola.snowflake-transformation`) survive the CSV → parquet roundtrip; invalid date strings (`'0000-00-00'`) and invalid numeric strings (`'Non-Manager'`) become NULL while keeping the column's typed schema. Pre-fix everything was VARCHAR.
- **Incremental sync** via Storage API `changedSince` — opt-in per table; pulls only delta rows, merges into the existing parquet by `primary_key` (drop_duplicates with keep='last'). Cuts daily extraction from O(full table) to O(delta).
- **Partitioned sync** — flat per-partition layout `data/<table>/<key>.parquet` (e.g. `2026_05.parquet`), per-affected-partition merge for daily updates, chunked initial load with 1-day overlap and 2-empty-chunk stop heuristic.
- **`where_filters`** — server-side row filter with date placeholders (`{{today}}`, `{{last_3_months}}`, `{{start_of_3_months_ago}}`, etc.) resolved at sync time. Force the SDK path; reject `incremental + where_filters` combination at API layer (changedSince already filters temporally).
## Architecture
- **Schema migration v25 → v26**: 7 new columns on `table_registry`. Existing `sync_strategy` column reused (pre-v26 it was inert catalog metadata; post-v26 the extractor dispatches off it).
- **Per-table dispatcher** in `extractor.run()` routes to one of `_extract_via_extension` (full_refresh + extension), `_extract_via_legacy` (full_refresh + filters or extension fallback), `extract_incremental`, or `extract_partitioned`.
- **API conflict policy**: `incremental + where_filters` → 422; `partitioned + query_mode='remote'` → 422; `partitioned ⇒ partition_by required`.
- **Admin UI**: third "Direct extract (Storage API)" radio in the Keboola Register / Edit modals, alongside existing "Whole table (extension)" and "Custom SQL". When selected, exposes a v26 sync-strategy panel with conditional fields per strategy.
## Test plan
- [x] **Unit + module** — 134 v26 tests covering migration, repo, parquet_io, where_filters, incremental (compute_changed_since + merge_parquet + extract_incremental E2E), partitioned (key derivation + merge_partition + chunked windows + extract_partitioned E2E), extractor dispatcher, admin API validators, PUT field clearing, registry-shape → dispatcher bridge
- [x] **HTML form structure** — all v26 inputs + visibility classes + JS payload fields verified in rendered template
- [x] **Real Keboola roundtrip** — registered a small test table as `sync_strategy='incremental'` against a test Storage project, triggered two syncs:
- Sync 1: `changedSince=None` → full pull → 9 rows typed parquet
- Sync 2: `changedSince=last_sync - 1d window` → 9 delta rows merged with 9 existing → 9 after dedup on primary_key (PK merge confirmed)
- [x] **Browser UX** — agent-browser session against a local uvicorn: login → admin/tables → register modal → switch radios → verify field visibility per strategy → submit → edit existing row → switch to Direct/Incremental → save → confirm DB persistence
- [x] **Regression** — no regressions in the broader 3252-test suite (3 pre-v26 tests updated for the deprecation-marker removal + schema-version bump; 2 pre-existing environment-sensitive test failures unrelated to this change)
## Bugs caught + fixed during E2E
The browser + real-Keboola roundtrip exposed four bugs the unit tests missed:
1. **JS visibility race** — two competing `forEach` loops set `display=''` then `display='none'` on form elements sharing `kb-strategy-incremental kb-strategy-partitioned` classes (window_days + max_history_days are reused across strategies). Fix: single-pass selector with class-based visibility resolver.
2. **PUT cannot clear field** — pre-v26 `updates = {k: v ... if v is not None}` collapsed "omitted from body" and "sent as null" into the same case, so admin couldn't switch a partitioned row back to full_refresh and have stale `partition_by` clear. Fix: `model_dump(exclude_unset=True)`.
3. **Subprocess DB lock conflict** — `_read_last_sync` reopened `system.duckdb` while the parent server held the write lock (subprocess contract at `app/api/sync.py:_run_sync` line 260). Fix: parent injects `__last_sync__` into table_config before subprocess spawn.
4. **Wrong KBC table_id** — `extract_incremental` / `extract_partitioned` built the Storage API table_id from the registry row's slugified `id` (`circle_inc`) instead of `bucket.source_table` (`in.c-finance.circle`), producing 404s. Fix: prefer `bucket+source_table`; fall back to `id` only when bucket empty.
## Operator notes
- Existing tables stay on `full_refresh` after migration; admins opt individual tables in via `agnes admin register-table --sync-strategy ...`, the Keboola Edit modal, or `POST/PUT /api/admin/registry`.
- `merge_parquet` and `merge_partition` use `pd.concat + drop_duplicates`, loading both existing and delta into pandas RAM. For tables in the multi-million-row range this may OOM — switch to `partitioned` strategy for those (per-partition merge keeps memory bounded). Documented in `### Internal` of the changelog entry.
- Date placeholders are resolved at **sync time**, not register time — a typo'd `{{lasst_week}}` is accepted at register and surfaces only when the next sync runs. By design (rolling windows need late-binding).
## Spec source
The four corresponding plans on the `zs/keboola-connector-specs` branch under `docs/superpowers/plans/2026-05-07-0[1-4]-*.md` capture the design rationale and link back to internal repo references for each subsystem.
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## Summary
`agnes query "DESCRIBE unit_economics"` (where `unit_economics` is `query_mode='remote'`) previously returned DuckDB's nearest-name suggestion (`Did you mean "order_economics"`?), sending users down the wrong path. Now appends a friendly hint about remote tables.
Reproduced from a real analyst session — colleague spent ~30s diagnosing what was actually "this is a remote table, not materialized locally".
## Test plan
- [x] New test: `_query_local("DESCRIBE unit_economics", ...)` against an empty local DuckDB triggers the new hint, original DuckDB error still echoed.
- [x] Negative test: a syntax-error query does NOT trigger the hint (regex only matches "Table with name X does not exist").
- [x] `pytest tests/test_cli_query*.py` clean.
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The httpx client behind 'agnes query --remote' used the default 30s
timeout, killing every BigQuery SELECT that took longer than half a
minute — i.e. most non-trivial remote queries.
cli/client.py now exposes QUERY_TIMEOUT_S (default 300s, override via
AGNES_QUERY_TIMEOUT) and propagates a kw-only 'timeout' through
api_get/post/delete/patch. _query_remote passes QUERY_TIMEOUT_S so only
the long-running /api/query path gets the bump; every other CLI call
keeps the 30s default.
Server-side has no read deadline on /api/query, so the client cap was
the sole bottleneck.
The reporter (#160) saw `USER_PROJECT_DENIED` raw in the CLI because
all three CLI error-rendering paths flatten typed BqAccessError /
guardrail / RBAC dicts to a truncated single-line string, hiding the
structured `hint` field that explains how to fix the misconfig.
Fix: shared `cli/error_render.py:render_error(status_code, body)` that
recognizes the canonical typed shapes and pretty-prints them. Falls
back to truncated-and-flattened form for unrecognized bodies, so the
renderer never makes worse-than-status-quo output.
Recognized shapes:
- {detail: {kind: ..., hint?, billing_project?, data_project?}}
— typed BqAccessError responses from /api/v2/scan, /sample, /schema,
/api/query (when /api/query escalates a BQ failure)
- {detail: {reason: 'remote_scan_too_large', scan_bytes, limit_bytes,
tables, suggestion}} — new /api/query cost-guardrail rejection
- {detail: {reason: 'bq_path_not_registered'/'bq_path_access_denied',
path, hint?, registered_as?}} — new /api/query RBAC patch
- {detail: '...'} — string detail (legacy endpoints)
Wired through 3 CLI paths:
- cli/v2_client.py: V2ClientError.__str__ delegates to render_error;
pre-truncation removed from V2ClientError.message (was hiding hints
past 200 chars).
- cli/commands/query.py:_query_remote: parse JSON body, call renderer
on error.
- cli/commands/query.py:_query_hybrid: catch RemoteQueryError, build
synthetic `{detail: {kind: error_type, **details}}` payload, render.
tests/test_cli_query.py:test_remote_query_failure: assertion updated
from `"Query failed"` (no longer printed) to `HTTP 400` + `bad SQL`
(what the renderer surfaces for string detail).
Sample output for cross_project_forbidden:
Error: cross_project_forbidden (HTTP 502)
billing_project: (empty)
data_project: prj-example-data-001
message: USER_PROJECT_DENIED on bigquery.googleapis.com
hint: Set data_source.bigquery.billing_project in
/admin/server-config to a project where the SA has
serviceusage.services.use, or grant the SA that role on the
data project.
19 tests pass — 10 from T4a now GREEN + 3 prior cli_query tests still
green + 6 ancillary.
