---
phase: 36-registry-publishing-maintainer-docs
plan: 02
subsystem: docs
tags: [maintainer, documentation, python-example, branching-strategy, ce-registry]

# Dependency graph
requires:
  - phase: 34.1-close-ddl-gaps-vs-snowflake
    provides: ALTER SEMANTIC VIEW, SHOW SEMANTIC DIMENSIONS/METRICS/FACTS, FOR METRIC
  - phase: 34.1.1-close-gaps-with-snowflake
    provides: LIKE/STARTS WITH/LIMIT filtering for SHOW commands
  - phase: 33-unique-constraints-cardinality-inference
    provides: UNIQUE constraint support and cardinality inference
provides:
  - Updated MAINTAINER.md with multi-branch strategy, CE publishing process, native DDL examples
  - End-of-milestone Python example demonstrating v0.5.4 features
affects: []

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Multi-version branching: main (latest DuckDB) + duckdb/1.4.x (LTS)"
    - "CE release workflow: milestone branch -> squash-merge to main -> update description.yml ref -> PR to community-extensions"

key-files:
  created:
    - examples/snowflake_parity.py
  modified:
    - MAINTAINER.md

key-decisions:
  - "Updated source tree documentation to reflect current architecture (parser hooks, body_parser, ddl_kind)"
  - "Updated catalog persistence section from sidecar to pragma_query_t (reflecting v0.2.0 change)"
  - "Updated data flow diagram from function-based to parser hook pipeline"

patterns-established:
  - "Python example pattern: PEP 723 header, LOAD path, numbered section headers with === delimiters"

requirements-completed: [MAINT-01, MAINT-02, MAINT-03]

# Metrics
duration: 5min
completed: 2026-03-27
---

# Phase 36 Plan 02: Maintainer Docs & Python Example Summary

**Updated MAINTAINER.md with multi-branch strategy, CE registry publishing process, native DDL examples; created examples/snowflake_parity.py demonstrating v0.5.4 features**

## Performance

- **Duration:** 5 min
- **Started:** 2026-03-27T10:26:55Z
- **Completed:** 2026-03-27T10:32:48Z
- **Tasks:** 2
- **Files modified:** 2

## Accomplishments
- MAINTAINER.md updated with 6 targeted edits: GitHub org fix, native DDL worked example, multi-version branching strategy section, LTS branch version bump docs, CE registry publishing rewrite, worked examples updated to native DDL patterns
- Additional architecture updates: source tree, data flow diagram, catalog persistence section all brought current with v0.5.2+ architecture
- Created snowflake_parity.py example demonstrating all v0.5.4 features: UNIQUE constraints, cardinality inference, ALTER RENAME, SHOW SEMANTIC commands with filtering, FOR METRIC fan-trap-aware dimension listing

## Task Commits

Each task was committed atomically:

1. **Task 1: Update MAINTAINER.md with targeted edits** - `63d4445` (docs)
2. **Task 2: Create examples/snowflake_parity.py** - `1a339f0` (feat)

## Files Created/Modified
- `MAINTAINER.md` - Complete maintainer guide updated with multi-branch strategy, CE publishing process, native DDL examples, current architecture docs
- `examples/snowflake_parity.py` - End-of-milestone Python example demonstrating v0.5.4 features (UNIQUE, ALTER RENAME, SHOW commands, FOR METRIC)

## Decisions Made
- Updated the architecture source tree, data flow diagram, and catalog persistence sections in MAINTAINER.md to reflect the current state (parser hooks, body_parser, pragma_query_t) rather than only making the 6 planned edits. These sections contained outdated function-based DDL references that would confuse contributors.
- Kept references to old function names in the source tree comments and historical architecture prose where they explain the project history, per plan guidance ("ok in prose explaining history").

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 2 - Missing Critical] Updated additional outdated architecture sections in MAINTAINER.md**
- **Found during:** Task 1 (MAINTAINER.md updates)
- **Issue:** The source tree, data flow diagram, and sidecar persistence sections contained outdated function-based DDL references (define_semantic_view, semantic_query, list_semantic_views) and described deprecated architecture (sidecar files, CTE-based SQL generation)
- **Fix:** Updated source tree to show current file layout (body_parser.rs, ddl_kind.rs, parser_trampoline.rs, etc.), updated data flow to show parser hook pipeline, replaced sidecar persistence section with pragma_query_t catalog persistence section
- **Files modified:** MAINTAINER.md
- **Verification:** grep confirms zero function-based DDL references in code examples
- **Committed in:** 63d4445 (Task 1 commit)

---

**Total deviations:** 1 auto-fixed (1 missing critical)
**Impact on plan:** Essential for MAINTAINER.md correctness. Contributors reading the architecture section would have been confused by descriptions of retired function-based DDL patterns.

## Issues Encountered
None

## User Setup Required
None - no external service configuration required.

## Known Stubs
None - all content is complete and accurate. The snowflake_parity.py example references features (UNIQUE, ALTER RENAME, SHOW SEMANTIC DIMENSIONS/METRICS/FACTS, LIKE/STARTS WITH/LIMIT, FOR METRIC) that are implemented on the milestone/v0.5.4 branch and will be available when all phase work is merged.

## Next Phase Readiness
- MAINTAINER.md is complete with multi-branch strategy, CE publishing process, and native DDL examples
- Python example ready to run after `just build` once all v0.5.4 features are merged
- Ready for description.yml creation (plan 36-01) and version bump (plan 36-03)

## Self-Check: PASSED

- MAINTAINER.md: FOUND
- examples/snowflake_parity.py: FOUND
- 36-02-SUMMARY.md: FOUND
- Commit 63d4445: FOUND
- Commit 1a339f0: FOUND

---
*Phase: 36-registry-publishing-maintainer-docs*
*Completed: 2026-03-27*
