Add codecov

[Dreamsorcerer]

Add codecov, so we can easily see coverage changes in each PR.

[greptile-apps]

Greptile Summary

This PR adds Codecov integration by wiring up coverage run/coverage xml in the CI workflow (unconditionally, including on PRs) and introducing a .coveragerc.toml config and a .codecov.yml. The workflow change correctly fulfils the PR's stated goal of seeing coverage diffs on each PR.

• P1 — .coveragerc.toml section headers are wrong: Coverage.py reads .coveragerc.toml as TOML and expects [tool.coverage.run] / [tool.coverage.report]; the current bare [run] / [report] headers are INI conventions and are silently ignored, meaning branch coverage, source restriction, and all exclusion patterns have no effect.

Confidence Score: 4/5

Safe to merge after fixing the TOML section headers in .coveragerc.toml; the workflow change itself is correct.

One P1 issue: the .coveragerc.toml config is silently ignored due to wrong section headers, so branch coverage and exclusions won't apply until fixed. The CI/Codecov wiring is otherwise correct and the previous push-only gating concern is resolved.

.coveragerc.toml — section headers must be changed to [tool.coverage.run] and [tool.coverage.report].

Important Files Changed

Filename	Overview
.coveragerc.toml	New coverage config file — uses INI-style [run]/[report] headers in a .toml file, which coverage.py won't recognise; all settings silently ignored. Needs [tool.coverage.run] / [tool.coverage.report].
.codecov.yml	Minimal Codecov config setting dev as default branch and suppressing missing-data errors; reasonable for bootstrapping.
.github/workflows/ci.yml	Coverage now runs unconditionally (no push-only gate), collecting coverage.xml and uploading to Codecov on every CI run including PRs — the stated PR goal is met.

Sequence Diagram

sequenceDiagram
    participant GH as GitHub Actions
    participant COV as coverage.py
    participant CC as Codecov

    GH->>COV: coverage run -m pytest (all events: push + PR)
    COV-->>GH: coverage.xml
    GH->>CC: codecov/codecov-action@v6 (upload coverage.xml)
    CC-->>GH: Coverage report posted to PR

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_{Reviews (2): Last reviewed commit: "Update ci.yml" | Re-trigger Greptile}

[greptile-apps]

Wrong TOML section headers — config silently ignored

Coverage.py auto-discovers .coveragerc.toml as a TOML file, but when read as TOML it expects [tool.coverage.run] / [tool.coverage.report] section headers. The bare [run] and [report] headers shown here are INI-format conventions; they are not recognized under TOML parsing, so branch = true, source, and all exclude_also patterns are silently dropped.

Suggested change

	[run]
	branch = true
	source = [
	'dimos',
	]
	[report]
	exclude_also = [
	'if TYPE_CHECKING',
	'assert False',
	': \.\.\.(\s*#.*)?$',
	'^ +\.\.\.$',
	'pytest.fail\('
	]
	[tool.coverage.run]
	branch = true
	source = [
	'dimos',
	]
	[tool.coverage.report]
	exclude_also = [
	'if TYPE_CHECKING',
	'assert False',
	': \.\.(\s*#.*)?$',
	'^ +\.\.\.$',
	'pytest.fail\('
	]