[codex] prepare 0.10.0 release

CHANGELOG.md

@@ -7,6 +7,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.10.0] - 2026-05-30
+
+### Added
+
+- **Structured undefined diagnostics for framework debug views** — `UndefinedError.to_diagnostic()` now returns a surface-neutral payload with error code, kind, location, source snippet, ordered hints, docs URL, metadata, template stack, and component stack. The diagnostic can render escaped HTML fragments/pages or GitHub-flavored Markdown without frameworks parsing terminal-formatted exception strings.
+
+### Fixed
+
+- **Undefined-error source attribution survives optimized rendering paths** — F-string coalescing now preserves the template line marker used by diagnostics, so optimized templates still report the editable source line.
+- **Imported component slot failures point at caller-owned source** — Errors raised inside slot bodies provided to imported components now attribute the primary diagnostic location to the caller template while retaining component-stack context.
+- **Streaming runtime errors use the same template-enhanced diagnostics as full render** — Generic Python exceptions raised during `render_stream()` are wrapped with template name and line information consistently with `render()`.
+
 ## [0.9.0] - 2026-05-10
 
 ### Breaking

README.md

@@ -346,6 +346,9 @@ for the Mapping behavior change in null-safe access (`?.` and `?[...]`).
 Moving from 0.8.x? See the [0.9 release notes](https://lbliii.github.io/kida/releases/0.9.0/)
 for the Markdown escaping and `| safe` trust-boundary changes.
 
+Moving from 0.9.x? See the [0.10 release notes](https://lbliii.github.io/kida/releases/0.10.0/)
+for structured diagnostics and source-attribution hardening.
+
 ## The Bengal Ecosystem
 
 Kida is part of a pure-Python stack built for 3.14t free-threading.

plan/release-0.10.0-roadmap.md

@@ -0,0 +1,264 @@
+# Release Roadmap: Kida 0.10.0
+
+**Status**: Release branch candidate prepared; final local gates passed; publishing not performed
+**Created**: 2026-05-30
+**Target theme**: Structured diagnostics and release-readiness hardening
+**Baseline**: `origin/main` at `66cf8ec` (`[codex] Improve UndefinedError diagnostics for framework views (#132)`)
+
+## Objective
+
+Ship the post-0.9.0 structured diagnostics work as a focused 0.10.0 release,
+without mixing in new syntax, new runtime dependencies, new schema versions, or
+large-app ergonomics features that still need separate approval.
+
+## Research Basis
+
+- Initial audit found `pyproject.toml` at `0.9.0`; release prep now updates the
+  project metadata and lockfile to `0.10.0`.
+- Initial local audit before fetching remote state found six post-`v0.9.0`
+  diagnostics commits: structured undefined diagnostics, preserved undefined
+  attribution, render surface diagnostic parity, a standalone diagnostic HTML
+  page, public docs, and the coalescing line-marker contract. Remote `main` now
+  carries that work as squash commit `66cf8ec` from PR #132, so the release
+  branch is based on current `origin/main` instead of replaying the pre-squash
+  local history.
+- Focused diagnostics tests pass, and `make lint` / `make ty` are clean on the
+  current baseline.
+- `CHANGELOG.md` initially had an empty `[Unreleased]` section; release prep now
+  includes a dated `0.10.0` changelog entry and published release-page source.
+
+## Steward Signals
+
+### Planning
+
+- Steward: Planning
+- Area: Release scope
+- Severity: P1
+- Invariant: Plans sequence real work and do not smuggle stop-and-ask changes.
+- Evidence: The active commits are diagnostics-only; large-app ergonomics is
+  still proposed and contains public API/open-question items.
+- User Impact: A focused release is reviewable and avoids making unrelated
+  promises.
+- Required Fix: Treat 0.10.0 as diagnostics hardening; defer new validation
+  APIs, schemas, and framework policies.
+- Required Proof: Changelog entry, roadmap record, focused tests, lint, and ty.
+- Collateral: `CHANGELOG.md`, docs pages touched by diagnostics.
+- Confidence: High
+
+### Runtime
+
+- Steward: Runtime
+- Area: Exception contracts
+- Severity: P1
+- Invariant: Public errors preserve template names, source locations, hints, and
+  zero-dependency rendering helpers.
+- Evidence: `UndefinedError.to_diagnostic()` exposes location, snippets, hints,
+  stacks, docs URL, and escaped HTML/Markdown renderers.
+- User Impact: Framework debug pages can stop scraping terminal-formatted text.
+- Required Fix: Do not export new top-level diagnostic dataclasses in this
+  release unless explicitly approved; document the current method-based access.
+- Required Proof: `tests/test_diagnostics_contract.py` and public API snapshot.
+- Collateral: Error handling and undefined-variable docs.
+- Confidence: High
+
+### Template Runtime
+
+- Steward: Template Runtime
+- Area: Render-mode diagnostic parity
+- Severity: P1
+- Invariant: Full render, streaming, imported components, and slot caller bodies
+  attribute failures to the template line users can edit.
+- Evidence: Existing focused tests cover coalesced output source lines, imported
+  slot errors, component stacks, streaming runtime enhancement, HTML pages, and
+  Markdown diagnostics.
+- User Impact: Users debugging generated code see actionable template source,
+  not misleading Python frames.
+- Required Fix: Keep diagnostic tests in the release gate; add more render-mode
+  parity only if failures appear.
+- Required Proof: Focused diagnostics suite and full test/coverage gate.
+- Collateral: Troubleshooting docs mention caller-template attribution for slots.
+- Confidence: High
+
+### Compiler
+
+- Steward: Compiler
+- Area: F-string coalescing source locations
+- Severity: P1
+- Invariant: Hot-path coalescing must not erase source mapping.
+- Evidence: `fix: declare coalescing line marker contract` plus a test asserting
+  undefined diagnostics remain on the correct template line with coalescing on.
+- User Impact: Optimized templates remain debuggable.
+- Required Fix: No further compiler optimization in this release without
+  benchmark or explicit no-benchmark rationale.
+- Required Proof: Existing coalescing diagnostic test; no benchmark required for
+  source-map-only hardening.
+- Collateral: Changelog names the source-location fix.
+- Confidence: Medium-high
+
+### Static Analysis
+
+- Steward: Static Analysis
+- Area: Diagnostic/code contract
+- Severity: P2
+- Invariant: Codes and machine-readable diagnostics stay documented and
+  snapshotable.
+- Evidence: `test_every_error_code_is_documented()` covers all `ErrorCode`
+  anchors.
+- User Impact: CI and agents can link users to stable remediation docs.
+- Required Fix: Keep every new code documented before release.
+- Required Proof: Diagnostics contract tests.
+- Collateral: `site/content/docs/errors.md`.
+- Confidence: High
+
+### Docs Site
+
+- Steward: Documentation Site
+- Area: Public diagnostic docs
+- Severity: P1
+- Invariant: Public docs match current API names, tuple shapes, and render
+  behavior.
+- Evidence: Error-handling docs now describe `to_diagnostic()` and framework
+  debug-page usage; a docs typo incorrectly referenced `ErrorCode.K_RUN_001`
+  before this roadmap pass.
+- User Impact: Framework authors can copy examples without runtime errors.
+- Required Fix: Keep docs examples aligned with actual exception attributes.
+- Required Proof: Docs source review and docs build when release collateral is
+  finalized.
+- Collateral: `site/content/docs/usage/error-handling.md`,
+  `site/content/docs/troubleshooting/undefined-variable.md`.
+- Confidence: High
+
+### Tests
+
+- Steward: Test Corpus
+- Area: Release evidence
+- Severity: P1
+- Invariant: User-facing diagnostics need focused assertions and release gates.
+- Evidence: Focused diagnostics suite passes locally.
+- User Impact: Regressions in escaping, attribution, or stack context fail before
+  release.
+- Required Fix: Run full release-relevant gates before tagging.
+- Required Proof: `make lint`, `make ty`, diagnostics tests, full test coverage;
+  `make verify-stability` for final release candidate.
+- Collateral: None beyond test output; no fixtures changed.
+- Confidence: High
+
+### Benchmark
+
+- Steward: Benchmark
+- Area: Performance evidence
+- Severity: P3
+- Invariant: Hot-path claims require benchmarks, but source-mapping fixes do not
+  need new public performance claims.
+- Evidence: The current changes do not advertise speedups.
+- User Impact: Avoids noisy benchmark churn for a diagnostics release.
+- Required Fix: No benchmark update unless a compiler/render hot-path change is
+  added after this plan.
+- Required Proof: Explicit no-benchmark rationale in release notes or PR body.
+- Collateral: no collateral: no performance claim or baseline change.
+- Confidence: Medium
+
+### GitHub Workflow
+
+- Steward: GitHub Workflow
+- Area: Release mechanics
+- Severity: P2
+- Invariant: Release/publish and floating action tag behavior must not change
+  casually.
+- Evidence: No workflow changes are needed for a diagnostics release.
+- User Impact: Existing release automation remains stable.
+- Required Fix: Use existing `make verify-stability`, release, and action-tag
+  process; do not alter workflows.
+- Required Proof: Local gate output and CI on the release PR.
+- Collateral: no collateral: workflows unchanged.
+- Confidence: High
+
+## Convergence
+
+All consulted stewards converge on a narrow 0.10.0: ship diagnostics hardening,
+document it, and verify release gates. No steward requires new syntax, public
+configuration, schemas, workflow permissions, or dependencies for this release.
+
+## Minority Reports
+
+- Large-app ergonomics remains important, but it should not be bundled into
+  0.10.0 unless a specific approved implementation is already complete and
+  covered by docs/tests. It has open questions around API shape and suppression
+  policy.
+- Benchmark steward does not require a new baseline for current diagnostics work,
+  but would object if later 0.10.0 changes alter compiler or render hot paths
+  while skipping performance evidence.
+
+## Ranked Backlog
+
+1. Release collateral for diagnostics: update `CHANGELOG.md`, docs examples, and
+   this roadmap.
+2. Verification: run focused diagnostics tests, `make lint`, `make ty`, full
+   test/coverage gate, safety/concurrency tests, docs build, and package smoke
+   before tagging.
+3. Release notes: maintain `site/content/releases/0.10.0.md` with the final
+   release date and user-facing upgrade notes.
+4. Optional hardening: add `TemplateRuntimeError.to_diagnostic()` only after a
+   public-contract check-in, because it widens the programmatic surface beyond
+   the current undefined-error implementation.
+5. Post-release: resume `plan/epic-large-app-ergonomics.md` starting with
+   route-agnostic context/catalog checks that already have evidence.
+
+## Not Now
+
+- No `TemplateDiagnostic` top-level export without explicit public API approval.
+- No new CLI flags or `Environment(...)` knobs.
+- No privacy-lint suppression/config surface.
+- No public render-packet schema.
+- No schema or report-template changes.
+- No workflow, publish, or action-tag behavior changes.
+- No benchmark baseline churn unless later code changes affect hot paths.
+
+## Parity Matrix
+
+| Contract | API/CLI | Programmatic | Protocol | Schema/Types | Docs | Examples | Tests |
+|---|---|---|---|---|---|---|---|
+| Undefined diagnostics | no CLI change | `UndefinedError.to_diagnostic()` | none | internal dataclasses only | error handling, troubleshooting | no new example | diagnostics contract |
+| Source attribution | no CLI change | exception fields/snippets | none | none | troubleshooting | no new example | coalescing, slots, streaming |
+| HTML/Markdown renderers | no CLI change | diagnostic format helpers | none | none | error handling | no new example | escaped output assertions |
+| Release process | existing Makefile | none | none | none | changelog/release notes | no new example | lint, ty, tests, verify-stability |
+
+## Execution Record
+
+- 2026-05-30: `uv run pytest tests/test_diagnostics_contract.py` passed.
+- 2026-05-30: `make lint` passed.
+- 2026-05-30: `make ty` passed.
+- 2026-05-30: `uv run pytest tests/test_diagnostics_contract.py tests/test_public_api_snapshot.py` passed.
+- 2026-05-30: `make docs` initially built 262 pages with one generated autodoc
+  `/llms.txt` health warning. After release-page and metadata updates, `make
+  docs` built 270 pages with clean health output.
+- 2026-05-30: `make test-cov` passed: 4,279 passed, 5 skipped, 84.14% coverage against the 83% floor.
+- 2026-05-30: `make format-check` passed.
+- 2026-05-30: `make package-smoke` passed against the prepared `0.10.0` package metadata.
+- 2026-05-30: `make test-safety` passed under `PYTHON_GIL=0`: 131 passed.
+- 2026-05-30: Version metadata updated to `0.10.0` in `pyproject.toml` and
+  `uv.lock`.
+- 2026-05-30: `site/content/releases/0.10.0.md` added.
+- 2026-05-30: Focused release verification passed against 0.10.0 metadata:
+  diagnostics contract, public API snapshot, compiler AST baseline, and async
+  streaming exception contract.
+- 2026-05-30: Final `make test-cov` passed: 4,279 passed, 5 skipped, 84.13%
+  coverage against the 83% floor.
+- 2026-05-30: Final `make verify-stability` passed: lint, format-check, ty,
+  full coverage, safety, and package smoke all completed successfully against
+  the prepared `0.10.0` release candidate.
+- 2026-05-30: README and installation docs updated for `0.10.0` upgrade/version
+  collateral; `make docs` rebuilt the site successfully with clean health checks.
+- 2026-05-30: After fetching, remote `main` was at `66cf8ec` and the local
+  pre-squash history diverged. Release prep was replayed onto
+  `codex/release-0.10.0` from current `origin/main` to avoid publishing the
+  duplicate pre-squash history. Remote tag push, GitHub release, PyPI publish,
+  and floating action tag update remain pending.
+- 2026-05-30: Origin-main-based focused verification passed:
+  `uv run pytest tests/test_diagnostics_contract.py tests/test_public_api_snapshot.py tests/test_kida_async_rendering.py::TestAsyncExceptionPropagation::test_error_in_async_iterable_propagates`
+  reported 15 passed.
+- 2026-05-30: Origin-main-based docs verification passed: `make docs` found no
+  pending site changes and completed with clean health checks.
+- 2026-05-30: Origin-main-based final `make verify-stability` passed: lint,
+  format-check, ty, full coverage, safety, and package smoke completed
+  successfully. Coverage summary: 84.1% against the 83% floor.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "kida-templates"
-version = "0.9.0"
+version = "0.10.0"
 description = "Pure-Python template components with static validation for HTML, Markdown, terminal, and CI reports"
 readme = "README.md"
 requires-python = ">=3.14"

site/content/docs/get-started/installation.md

@@ -67,7 +67,7 @@ uv sync
 
 ```python
 import kida
-print(kida.__version__)  # 0.9.0
+print(kida.__version__)  # 0.10.0
 ```
 
 Or from the command line:

site/content/docs/usage/error-handling.md

@@ -148,7 +148,7 @@ When an error occurs inside a `{% def %}` component, `TemplateRuntimeError` and
 try:
     template.render(data=data)
 except TemplateRuntimeError as e:
-    for def_name, lineno, tpl_name in e.component_stack:
+    for tpl_name, lineno, def_name in e.component_stack:
         print(f"  in {def_name}() at {tpl_name}:{lineno}")
 ```
 
@@ -230,7 +230,7 @@ from kida import UndefinedError, ErrorCode
 try:
     template.render()
 except UndefinedError as e:
-    print(e.code)        # ErrorCode.K_RUN_001
+    print(e.code)        # ErrorCode.UNDEFINED_VARIABLE
     print(e.code.value)  # "K-RUN-001"
 ```
 

site/content/releases/0.10.0.md

@@ -0,0 +1,56 @@
+---
+title: Kida 0.10.0
+description: Structured diagnostics, source attribution hardening, and release-readiness cleanup
+date: 2026-05-30
+draft: false
+lang: en
+tags: [release, changelog, diagnostics, errors, framework-integration, streaming]
+keywords: [release, 0.10.0, diagnostics, UndefinedError, source attribution, streaming, framework debug views]
+---
+
+# v0.10.0
+
+**Released** 2026-05-30.
+
+Kida 0.10.0 is a focused diagnostics release. It gives framework debug pages a
+structured error payload for undefined values, tightens source attribution across
+optimized and streaming render paths, and keeps the broader large-app roadmap out
+of this release until its public contracts are ready.
+
+## Added
+
+- **Structured undefined diagnostics** — `UndefinedError.to_diagnostic()` returns
+  a surface-neutral payload with code, kind, location, source snippet, ordered
+  hints, docs URL, metadata, template stack, and component stack.
+- **HTML and Markdown diagnostic renderers** — The diagnostic payload can render
+  escaped HTML fragments/pages or GitHub-flavored Markdown without downstream
+  frameworks parsing terminal-formatted exception strings.
+
+## Fixed
+
+- **Optimized templates keep source locations** — F-string coalescing preserves
+  the template line marker used by undefined diagnostics, so optimized output
+  still points at the source line users can edit.
+- **Imported component slot failures point at caller source** — Errors raised
+  inside slot bodies passed to imported components now report the caller template
+  as the primary diagnostic location while retaining component-stack context.
+- **Streaming runtime errors match full render diagnostics** — Generic Python
+  exceptions raised during streaming are wrapped with template name and line
+  information consistently with full render.
+
+## Upgrade Notes
+
+1. Framework debug pages should prefer `UndefinedError.to_diagnostic()` over
+   parsing `str(exc)` or `format_compact()`.
+2. If a test expected raw exceptions from async streaming, update it to assert
+   `TemplateRuntimeError` and inspect `__cause__` for the original exception.
+3. If you maintain compiler AST snapshots, regenerate them for the coalescing
+   line-marker contract.
+
+## Why this change
+
+Kida's diagnostic strings are optimized for terminal output. Frameworks need the
+same facts as plain data so they can render their own debug UI safely. This
+release makes undefined errors inspectable without scraping styled terminal
+text, and it closes a few attribution gaps that made optimized or streaming
+renders harder to debug than full renders.