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Run project SQL in UTC; level dashboard cards; link footer to repo - #2

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Sep 22, 2026
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@easeev easeev commented Sep 22, 2026

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Summary

  • Table alignment follows the column, not the cell. Deciding it per value left a null, which has no digits, out of line with the figures above it, and left-aligned a count column's header over its right-aligned numbers. A declared amount and an anchored scalar numeric type answer for themselves; only VARCHAR is settled by its values, so an undeclared uint256 still reads as a number while a list of numbers, a struct, a bit string and an enum label do not.
  • Amount columns line up. A rounded amount now keeps its trailing zeros, so a column reads down the decimal point instead of printing "9,000,000", "1,499,999.5" and "101,570,558.71" side by side. scaleAmount was serving two callers with opposite needs: the lossless rendering, where trimming is right, and figures displayAmount had already rounded to a fixed width, where it is wrong. It takes a flag now, and only the exact rendering trims.
  • Query worker runs project SQL in UTC. block_timestamp is TIMESTAMP WITH TIME ZONE, and DuckDB renders, casts and buckets it in the session zone, which follows the machine. A fork of a published release built on a UTC+8 laptop reproduced every total but shifted every hourly and daily figure by eight hours. The worker now pins TimeZone='UTC' before any project SQL. The setting comes from the ICU extension the bundled DuckDB binaries link statically; a build without it fails with a clear error before project SQL runs, rather than computing in local time. The contract is documented in docs/capabilities.md.
  • Viewer: level grid cards. Panels in a grid row stretch to equal height and KPI values sit at the bottom of the card, so a KPI with a description no longer misaligns its row.
  • One spelling for the product name, one treatment for footer links. The dashboard footer credits Chainplot by name and links to this repository. Both footer links now carry the same underline and differ only in weight, so a results_only release, which has no fork link, does not present its one remaining link as plain text. Capitalized is how the docs and the page title already spell the product, so the scaffolding template and the usdc-supply example now match; lowercase stays for the command, the config file, the image tag and the repository path. Dated plan and spec documents are left as written.

Verification

  • tests/query/timezone.test.ts: the session TimeZone reads back UTC; a parquet TIMESTAMP WITH TIME ZONE column renders, buckets by day, hour()s and casts to TIMESTAMP in UTC. Run on a UTC+8 host, where it fails without the worker change.
  • Full offline suite: 321 passed, 3 skipped, including the scaffolded-template runs that copy the edited template files.
  • Live check: a release published from the producer container (UTC) and a fork of it rebuilt on a UTC+8 host produce identical rows in all 20 result files; before the change, the five time-bucketed results differed.
  • Dashboard rendered at desktop and 375 px widths: KPI rows level, no horizontal overflow, charts and tables inside their cards; footer reads "Built by Chainplot", both links resolve and computed styles show the same underline on each; every amount column renders at a uniform width, and each header sits on the same edge as its cells.

🤖 Generated with Claude Code

Summary by CodeRabbit

  • New Features

    • Query results now consistently use UTC for timestamp rendering, casting, formatting, and day-based grouping.
    • Numeric columns are identified more reliably, including inferred numeric text values.
    • Numeric displays preserve consistent decimal alignment and two-digit precision.
    • Footer branding now links to the project repository.
  • Bug Fixes

    • Viewer cards in the same row now stretch to equal height, with KPI content aligned consistently.
  • Documentation

    • Documented UTC query behavior and ICU time-zone support requirements.
    • Standardized product-name capitalization across example and template guidance.

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📝 Walkthrough

Walkthrough

The query worker now enforces UTC timestamp handling with ICU support. Viewer formatting, numeric-column detection, repository linking, panel layout, and brand styling changed. Example and template comments now capitalize Chainplot.

Changes

UTC query handling

Layer / File(s) Summary
UTC session enforcement
docs/capabilities.md, src/query/workerMain.ts
The worker sets DuckDB's TimeZone to UTC before project SQL runs. It reports an internal error when ICU support is unavailable. The documentation describes this contract.
UTC timestamp validation
tests/query/timezone.test.ts
Tests verify UTC session settings and UTC handling for TIMESTAMPTZ rendering, bucketing, casting, and hour extraction.

Viewer formatting

Layer / File(s) Summary
Numeric formatting and classification
viewer/src/format.ts, tests/viewer/format.test.ts
Display formatting preserves trailing zeros for aligned values. Numeric-column classification uses metadata and values. Tests cover rounding and supported column types.
Numeric column rendering
viewer/src/App.tsx
DataTable computes numeric columns once and uses the result for header and cell styling.

Viewer layout and naming

Layer / File(s) Summary
Repository link and panel layout
viewer/src/App.tsx, viewer/src/styles.css
The footer brand links to the repository. Panel rows stretch to equal height, and KPI content aligns at the bottom of panels. Brand styling targets the brand element.

Project name casing

Layer / File(s) Summary
Example and template naming
examples/usdc-supply/*, templates/ingest-transfers/*
Producer image instructions and related comments capitalize Chainplot. Configuration behavior does not change.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant QueryWorker
  participant DuckDB
  participant ProjectSQL
  QueryWorker->>DuckDB: Disable external access
  QueryWorker->>DuckDB: Set TimeZone to UTC
  DuckDB-->>QueryWorker: Confirm setting or return ICU error
  QueryWorker->>ProjectSQL: Run models and project SQL
Loading

Merge Risk: 🔵 Low · up to b0339

The test can accumulate temporary resources across runs. This is bounded maintenance risk and remains mergeable with owner awareness.

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Check name Status Explanation
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Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title clearly summarizes several major changes: UTC project SQL execution, equal-height dashboard cards, and the repository footer link. It is concise and directly related to the changeset.
Full details: Docstring Coverage

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Docstring coverage is 54.55% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 11 functions across 5 files. (7 skipped: 7 unsupported.)

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🧹 Nitpick comments (1)
tests/query/timezone.test.ts (1)

12-12: 🩺 Stability & Availability | 🔵 Trivial | 💤 Low value

Remove the timestamp fixture directory after each test. timestampFixture returns only the Parquet path, so neither caller can remove the directory. Return a cleanup callback or the directory path, and remove it in a finally block. Explicitly close the DuckDB instance after COPY.

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In `@tests/query/timezone.test.ts` at line 12, Update timestampFixture and its
callers so the temporary fixture directory can be cleaned up after each test:
return the directory path or a cleanup callback alongside the Parquet path,
remove it in a finally block, and explicitly close the DuckDB instance after
COPY completes.

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Nitpick comments:
In `@tests/query/timezone.test.ts`:
- Line 12: Update timestampFixture and its callers so the temporary fixture
directory can be cleaned up after each test: return the directory path or a
cleanup callback alongside the Parquet path, remove it in a finally block, and
explicitly close the DuckDB instance after COPY completes.

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@easeev
easeev force-pushed the claude/arc-chainplot-demo-f122de branch from 52c6b5e to 6f45d7d Compare September 22, 2026 06:15
@easeev

easeev commented Sep 22, 2026

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Thanks — leaving the fixture nit as-is, non-blocking.

tests/query/models.test.ts already creates its fixture with fs.mkdtempSync and no cleanup, so the new test follows the established convention in this directory rather than introducing a second one. Both write a few KB into the OS temp directory from a short-lived test process, which the OS reclaims; the in-memory DuckDB instance in the new fixture dies with that process. Changing one of the two files would leave the pattern inconsistent, and changing both is unrelated to this PR.

Worth doing as a standalone cleanup across the query tests if the temp churn ever matters.

@easeev
easeev force-pushed the claude/arc-chainplot-demo-f122de branch 3 times, most recently from f6277c1 to 5cceea0 Compare September 22, 2026 07:00
…e the product consistently; query: run project SQL in UTC

A rounded amount keeps its trailing zeros, so a column of amounts lines up
on the decimal point instead of printing "9,000,000", "1,499,999.5" and
"101,570,558.71" side by side. `scaleAmount` was doing double duty: it is
the lossless rendering, where dropping trailing zeros is right, and it was
also rendering figures `displayAmount` had already rounded to a fixed
width, where dropping them is wrong. It now takes a flag, and only the
exact rendering trims.

Alignment is decided once per column rather than per cell. Deciding it per
value left a null, which has no digits, out of line with the figures above
it, and left-aligned a count column's header over its right-aligned
numbers. A declared amount and an anchored scalar numeric type answer for
themselves; only VARCHAR is settled by its values, so a uint256 that was
never declared an amount still reads as one while a list of numbers, a
struct, a bit string and an enum label do not.

Panels in a grid row stretch to equal height and KPI values sit at the
bottom of the card, so a KPI with a description no longer breaks the row.

The dashboard footer credits Chainplot by name and links to this
repository. Both footer links carry the same underline and differ only in
weight, so a release published `results_only`, which has no fork link, does
not present its one remaining link as plain text. Capitalized is how the
docs and the page title already spell the product, so the templates and the
usdc-supply example now match; lowercase stays for the command, the config
file, the image tag and the repository path. Dated plan and spec documents
are left as written.

The query worker sets TimeZone='UTC' before any project SQL. rindexer
exports block_timestamp as TIMESTAMP WITH TIME ZONE and DuckDB renders,
casts and buckets that type in the session zone, so a fork built outside
UTC published different hourly and daily figures than the producer. The
setting comes from DuckDB's ICU extension, which the bundled binaries
link statically; a build without it fails before project SQL runs. The
contract is documented in docs/capabilities.md and covered by a test
against a parquet TIMESTAMPTZ column.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
@easeev
easeev force-pushed the claude/arc-chainplot-demo-f122de branch from 5cceea0 to b0339ab Compare September 22, 2026 07:22
@easeev
easeev merged commit d5136ca into main Sep 22, 2026
6 of 7 checks passed
@easeev
easeev deleted the claude/arc-chainplot-demo-f122de branch September 22, 2026 08:02
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