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feat(compact-lint): biome output, compact.toml, sections, timings, artifacts - #189

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0xisk wants to merge 8 commits into
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feat/compact-lint-diagnostics

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@0xisk

@0xisk 0xisk commented Sep 15, 2026 •

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Types of changes

  • Bugfix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to not work as expected)
  • Documentation Update (if none of the other choices apply)

Depends on #186, merge after.

Five changes from user testing, one commit each. Read them in order.

Biome-style diagnostics (2b05856). Output follows Biome's diagnostic shape and levels, so compact-lint reads like biome check, which runs beside it in compact-contracts CI. Not visible in the diff:

  • Placeholders (k=?, rows=?) and unmeasured circuits default to warn. A run with only warnings exits 0, so check on a feature branch no longer fails on a tag that fill-constraints fills at release. --strict promotes the placeholder rule to error.
  • The header fills to 100 columns rather than Biome's terminal width; the renderer has no terminal probe.
  • fix and fill-constraints diagnostics are info whatever the rule's level, since the run is repairing them.
  • A rule set to off is not run, so format = "off" skips the formatter spawn like --no-format.
  • Breaking: the old one-line format is gone. --reporter concise is the nearest replacement.

One compact.toml (3f722cb). compact-deploy already owns compact.toml, so the linter moves under a [lint] table there and compact-lint.toml goes away before anything ships.

  • The deployer needs no code change. Its Zod root is not .strict(), so it already drops [lint]; the new deployer test keeps that true.
  • version = 1 is gone; the deployer's half of the file has no version key either.
  • The 28 fixture configs moved with git mv; no expected*.txt changed.
  • If Midnight's own compact CLI ever claims compact.toml, [lint] survives as a namespace. The deployer's bare tables would not; moving them is a separate decision.

Doc sections (0ce9b33). Section-aware tag entries (@notice Privacy) in kinds.<kind>.tags; sections is the full allowed list in template order and, when set, the order required entries must follow too. unknown-section (warn, gated per tag) and tag-order (error, fixable by reordering blocks). Not visible in the diff: the real ConfidentialNoteFungibleToken header interleaves optional sections between required ones, which is why order comes from one merged sections list rather than the required list alone. The linter ships no section list; the example config carries a starting point for compact-contracts.

--timings (fbf050a). Per-phase wall-clock table on stderr. Measured on 39 files: the lint pass is ~70 ms and compact format --check is ~2.7 s (98%), a subprocess cost the linter cannot shrink. Fix previews are computed for every issue and only 20 are shown; deferring them to the shown set is a follow-up.

Artifact-dir measurements (c69476d). Pairs with #191: fill-constraints reads and writes <artifacts>/<Contract>/circuit-info.json instead of the hidden source-tree sidecar. [lint.constraints] artifacts names the tree (contracts/artifacts for compact-contracts). Merge after #191 or the two --no-compile paths disagree on where the file lives. Both touch the same .gitignore lines; both delete them.

Start with crates/compact-lint/src/diagnostic.rs, then src/config.rs.

PR Checklist

  • I have read the Contributing Guide
  • I have added tests that prove my fix is effective or that my feature works
  • I have added documentation of new methods and any new behavior or changes to existing behavior
  • CI Workflows Are Passing

The one-line `path:line:col: rule: message` output is replaced by a
Biome-shaped block per diagnostic: header with the rule name and a
FIXABLE / FIXED badge, the message under a level glyph, a code frame
with the span underlined, one advice line, and the fix as a line diff.

* Levels: every rule reports at error, warn, info or off, set in a
  `[rules]` table. Placeholders and unmeasured circuits default to
  warn so they no longer fail a run; `--strict` promotes placeholders.
  Exit 1 needs an error, or a warning with `--error-on-warnings`.
* Reporters: `default`, `concise` (one line per diagnostic) and
  `github` (workflow commands, escaped per the spec). Diagnostics go
  to stdout; the truncation notice and the `Checked N files in T.`
  summary go to stderr. `--max-diagnostics` caps what is shown at 20.
* fix and fill-constraints render through the same reporter, with
  Safe / Unsafe fix titles and an Applied fix title after a write.
@0xisk
0xisk requested review from a team as code owners September 15, 2026 14:34
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Walkthrough

The linter now uses shared compact.toml configuration and structured diagnostics. Check, fix, and fill support severity filters, multiple reporters, fix previews, summaries, and unified exit handling. Tests and documentation now cover the new behavior.

Changes

Unified lint diagnostics

Layer / File(s) Summary
Shared configuration and documentation
Cargo.toml, crates/compact-lint/Cargo.toml, crates/compact-lint/README.md, crates/compact-lint/examples/*, packages/linter/README.md
The linter uses compact.toml, a [lint] table, configurable rule levels, and shared deployer configuration.
Diagnostic model and lint pipelines
crates/compact-lint/src/diagnostic.rs, src/rules.rs, src/edit.rs, src/check.rs, src/fix.rs, src/fill.rs, src/format.rs, src/model.rs, src/report.rs
Findings are replaced by diagnostics with spans, levels, advice, fix previews, badges, reporters, and summaries. Fix and fill workflows return structured diagnostic outcomes.
CLI integration
crates/compact-lint/src/main.rs
Check, fix, and fill share output options, rendering, summaries, stream separation, warning escalation, diagnostic limits, and exit-code handling.
Validation fixtures and tests
crates/compact-lint/tests/*, packages/deployer/src/config/compact-config.test.ts
Tests and fixtures cover configuration migration, diagnostic levels, reporters, truncation, formatting, dry runs, applied fixes, measurement outcomes, and deployer table handling.

Priority: ➖ Normal

Estimated code review effort: 5 (Critical) | ~90 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant CLI
  participant Linter
  participant DiagnosticOutput
  participant Summary
  CLI->>Linter: run check, fix, or fill
  Linter->>DiagnosticOutput: return structured diagnostics
  DiagnosticOutput->>CLI: render selected diagnostics
  CLI->>Summary: provide counts and action
  Summary->>CLI: render summary and determine exit status
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Merge Risk: 🟡 Moderate · up to 3f722

Existing projects that upgrade without migrating their configuration can silently lint with different rules and file coverage. Document the required migration before merging.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 78.92% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 185 functions across 16 files. (80 skippe… Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
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 accurately identifies the main changes: Biome-style output, shared compact.toml configuration, documentation sections, timings, and related compact-lint updates.
Full details: Docstring Coverage

Explanation

Docstring coverage is 78.92% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 185 functions across 16 files. (80 skipped: 80 unsupported.)

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One project, one config file. compact-deploy already owns
`compact.toml`, so the linter moves its settings under a `[lint]`
table there and `compact-lint.toml` goes away before anything ships.

* The linter parses the whole document but deserialises only `lint`;
  every other table is another tool's and is ignored. A file with no
  `[lint]` table is a config error, no file at all keeps the built-in
  defaults.
* The `version` key is dropped: tables are namespaced per tool and the
  deployer's file has none either.
* A deployer test pins that its loader strips the `[lint]` table, so
  the two tools keep sharing the file without a schema change.
@0xisk 0xisk changed the title feat(compact-lint): render biome-style diagnostics feat(compact-lint): biome-style output, compact.toml and doc sections Sep 15, 2026
@0xisk
0xisk added this pull request to stack #183 September 15, 2026 14:58

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Actionable comments posted: 1

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Inline comments:
In `@crates/compact-lint/README.md`:
- Around line 303-304: Update the configuration documentation to include
migration steps from compact-lint.toml: rename it to compact.toml, remove the
obsolete version field, and nest existing settings under the [lint] table. Also
record this breaking configuration change in the linter changelog.

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📒 Files selected for processing (105)
  • Cargo.toml
  • crates/compact-lint/Cargo.toml
  • crates/compact-lint/README.md
  • crates/compact-lint/examples/compact-contracts.toml
  • crates/compact-lint/examples/compact.toml
  • crates/compact-lint/src/check.rs
  • crates/compact-lint/src/config.rs
  • crates/compact-lint/src/diagnostic.rs
  • crates/compact-lint/src/edit.rs
  • crates/compact-lint/src/fill.rs
  • crates/compact-lint/src/fix.rs
  • crates/compact-lint/src/format.rs
  • crates/compact-lint/src/lib.rs
  • crates/compact-lint/src/main.rs
  • crates/compact-lint/src/model.rs
  • crates/compact-lint/src/report.rs
  • crates/compact-lint/src/rules.rs
  • crates/compact-lint/tests/check.rs
  • crates/compact-lint/tests/fill.rs
  • crates/compact-lint/tests/fix.rs
  • crates/compact-lint/tests/fixtures/clean/compact.toml
  • crates/compact-lint/tests/fixtures/constraints-format/compact.toml
  • crates/compact-lint/tests/fixtures/constraints-format/expected.txt
  • crates/compact-lint/tests/fixtures/constraints-placeholder/compact.toml
  • crates/compact-lint/tests/fixtures/constraints-placeholder/expected-strict.txt
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  • crates/compact-lint/tests/fixtures/diagnostic-level/Mixed.compact
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  • crates/compact-lint/tests/fixtures/missing-tag/compact-lint.toml
  • crates/compact-lint/tests/fixtures/module-name/compact-lint.toml
  • crates/compact-lint/tests/fixtures/missing-constraints/compact-lint.toml
  • crates/compact-lint/tests/fixtures/missing-doc/compact-lint.toml
  • crates/compact-lint/examples/compact-contracts.toml

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Comment thread crates/compact-lint/README.md
Module headers in compact-contracts are a sequence of named sections
(`@notice Privacy:`, `@dev Performance:`, …). A bare `@notice` entry
cannot tell them apart, so a config entry may now carry a heading.

* `kinds.<kind>.tags` entries read `@tag` or `@tag Heading`; a headed
  entry matches only the occurrence whose value opens `Heading:`.
  `kinds.<kind>.sections` lists every allowed section in template
  order and, when set, is the order `tags` entries must also appear in.
* `unknown-section` (warn) reports a heading the template does not
  list, gated per tag so free-form tags stay untouched. `tag-order`
  (error) reports the first block out of template order; its fix
  reorders the listed blocks and leaves unlisted ones in their slots.
* `fix` inserts a missing section as `@tag Heading:` plus a placeholder
  line, after its nearest present predecessor in the order.
* The linter ships no section list. The example config carries a
  starting point for compact-contracts.
A run on 39 files takes about 3 s, and nothing in the output said that
97% of it is the `compact format --check` subprocess. `--timings`
prints a per-phase wall-clock table on stderr after the summary,
longest phase first with a detail column naming what it worked on, so
a slow run points at its own cause.

Phases are recorded unconditionally and printed only under the flag.
The total is the sum of the phases, not the run's wall clock.
@0xisk 0xisk changed the title feat(compact-lint): biome-style output, compact.toml and doc sections feat(compact-lint): biome-style output, compact.toml, doc sections, timings Sep 15, 2026
The builder now writes `<artifacts>/<Contract>/circuit-info.json`
beside the compiler's own output instead of a hidden per-directory
sidecar in the source tree. `fill-constraints` follows: `--no-compile`
reads that file, and the linter's own compiles write it to the same
place, so a full ZK `yarn compile` in CI is all the fill step needs.

* `[lint.constraints] artifacts` names the tree, relative to
  compact.toml; `--artifacts` overrides it. The temp-dir default is
  gone, compiler output is kept where the builder keeps it.
* Lookup is `<artifacts>/<Stem>/` first, then a walk for a hierarchical
  tree; two hits for one stem is an error.
* `.gitignore` drops the sidecar block; the fixture moves under
  `artifacts/` with an exception for the test tree.
@0xisk 0xisk changed the title feat(compact-lint): biome-style output, compact.toml, doc sections, timings feat(compact-lint): biome output, compact.toml, sections, timings, artifacts Sep 16, 2026
…ions

# Conflicts:
#	crates/compact-lint/README.md
#	crates/compact-lint/src/config.rs
#	crates/compact-lint/src/fix.rs
#	crates/compact-lint/src/rules.rs
Bare fences trip markdownlint MD040 and give the renderer
nothing to go on.
A rename writes a bare tag, so it cannot supply a headed entry
such as `@notice Security`; skipping the insert left the section
missing and a second check still reported it.
return;
}

let at = tag_block_end(lines, closer, after).map_or(1.min(closer), |end| end + 1);

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Inserted sections split a multi-paragraph @description, and the later paragraphs move under the last new section.

tag_block_end stops a block at the first blank comment line. In compact-contracts, module @description blocks have several paragraphs. fix inserts the missing sections after the first paragraph, so the rest of the description follows @dev Performance:.

Reproduce: copy examples/compact.toml to a checkout of compact-contracts main and run compact-lint fix. The output is Fixed 45 files. In contracts/src/access/Ownable.compact:

 * @description An unshielded Ownable library.
 * ...
 * @notice Privacy:
 * TODO
 * ...
 * @dev Performance:
 * TODO
 *
 * Authorization is based on a witness-derived identity scheme. ...
 * Because the account identifier is `H(secretKey)` with no per-deployment salt ...

The authorization and cross-contract linkability paragraphs now belong to @dev Performance. check reports nothing, so CI does not show it.

Fix: anchor the insertion after the whole untagged run that follows the previous entry (up to the next tag line, blank lines included), or before the first tag that the template orders after the new section. Add a fixture with a two-paragraph @description and a missing section.

return;
}

let prose_end = (1..closer)

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The tag-order safe fix ignores the /** and */ lines, so it can move text to a different section.

reorder_blocks permutes only lines 1..closer. The parser reads tags and text on the /** and */ lines as part of their blocks.

Reproduce with tags and sections = ["@module", "@notice Privacy", "@notice Security"]:

/**
 * @module M
 * @notice Security:
 * - nonces are spend-critical.
 * @notice Privacy:
 * - amounts are public. */
module M {
}

fix prints Fixed 1 file and writes:

 * @notice Privacy:
 * @notice Security:
 * - nonces are spend-critical.
 * - amounts are public. */

The privacy statement now belongs to Security, and check exits 0. When a section starts on the /** line, fix reports Fixed 1 file, changes nothing, and every later check still reports tag-order.

This is the same root cause as the edit.rs:237 comment on #184.

Fix: move content on the /** and */ lines to their own body lines before the reorder, or return no edit for such comments. Count a fix only when the text changes. Add fixtures for both delimiter lines.


sources.stop(timings, format!("{} files with annotations", work.len()));

let artifacts = Artifacts {

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fill-constraints --dry-run writes compiler output into the project artifacts tree.

The README and the comment at line 208 say that a dry run writes nothing, the artifact file included. The dry_run check protects only the circuit-info.json write. Compiler::measure still receives the persistent artifacts directory, and compact compile writes compiler/, contract/, keys/ and zkir/ there.

Reproduce: copy the fill-basic fixture and run fill-constraints --dry-run --compact-bin tests/fixtures/fill-fake-compact/bin/compact. The sources stay unchanged, but the run creates artifacts/MockOwnable/compiler/contract-info.json. With examples/compact.toml, the directory is contracts/artifacts, so a preview overwrites the builder's output for that contract.

Fix: when dry_run is set and the run compiles, compile into a temporary directory. Keep --no-compile reads on the configured directory. Extend assert_case in tests/fill.rs to compare the whole tree.

)
.context("writing the report")?;

if outcome.unmeasured > 0 {

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fill-constraints exits 1 for an unmeasured circuit at every level except off.

examples/compact.toml says to set a rule to warn or info to keep it out of the exit code. This check returns EXIT_FINDINGS when outcome.unmeasured > 0, before the level-based exit code.

Reproduce on the fill-basic fixture with:

[lint.rules]
constraints-unmeasured = "info"
constraints-unmeasurable = "info"

fill-constraints exits 1 (initialize has no measurement). check on the same config exits 0. At the default warn level, the run also exits 1 with Found 1 warning.

In compact-contracts, the mocks call initialize from their constructors, so the module initialize circuits are not measurable. A CI step that runs fill-constraints fails on every run, and the only way to stop it is off, which also hides the gap.

Fix: derive the exit code from the diagnostic levels and --error-on-warnings, as check and fix do. If exit 1 is intended, state it in the README and in the example config.

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