cppa-cursor-browser: Export script — consolidate orchestration + wire summary cache for CLI

[clean6378-max-it]

Calendar Day

Monday, June 22, 2026 (PR 1 of 2)

Planned Effort

5 story points — sprint item #3 (High)

Continues: cppa-cursor-browser #42 (closed via PR #61, May 2026) — this PR finishes the remaining consolidation and adds CLI summary-cache wiring.

Companion PR: Monday PR 2 (os.environ fix #4) — same scripts/export.py; land this consolidation first so the explicit-override plumbing slots into the shared engine.

Prior work (#42 / PR #61)

Issue #42 flagged scripts/export.py as a ~700-line parallel implementation of the web pipeline. PR #61 (Brad, merged 2026-05-21) closed #42 by:

• Delegating workspace scanning to services/workspace_db._collect_workspace_entries()
• Replacing private utility copies with imports from utils/workspace_path, utils/text_extract, services/workspace_resolver
• Extracting Markdown generation to utils/cursor_md_exporter.cursor_ide_chat_to_markdown()
• Deduplicating bubble/layout/diff loaders into services/workspace_db._load_*_map() (also consumed by workspace_listing, workspace_tabs, api/export_api)
• Guarding sys.path.insert under if __name__ == "__main__" (inert when installed via entry point)

Still open after #61 (this PR's scope):

• scripts/export.py is still ~540 lines with its own orchestration loop — no shared export_engine.py and no use of services/workspace_listing.py
• Summary cache (services/summary_cache.py) benefits the web path only; CLI re-scans on every run
• [[tool.mypy.overrides]] for scripts.export with ignore_errors = true remains in pyproject.toml
• sys.path.insert guard still present for direct python scripts/export.py invocation (not fully eliminated)

Problem

scripts/export.py (542 lines) duplicates substantial business logic from the services/ and utils/ layers rather than calling them through a shared interface. The script directly performs workspace scanning, database reading, workspace resolution, exclusion filtering, and markdown export. services/workspace_listing.py implements the same orchestration with caching (via services/summary_cache.py) — none of which benefits the CLI path. This duplication is explicitly exempted from mypy strict checking via [[tool.mypy.overrides]] in pyproject.toml (ignore_errors = true), so type-safety regressions in the CLI export path are invisible.

Goal

One merged PR that extracts a shared export-orchestration engine, reduces scripts/export.py to a thin CLI wrapper, routes both the web and CLI paths through it (so the summary cache benefits the CLI), and removes the mypy-strict exemption — with no behavioral change to CLI export output.

Scope

Touch points

• services/export_engine.py (new or extend) — shared orchestration function
• scripts/export.py — reduce to arg-parsing + calling the engine + output writing
• services/workspace_listing.py — refactor to use the shared engine
• services/summary_cache.py — consumed by the engine (read-only; no change)
• pyproject.toml — remove the [[tool.mypy.overrides]] ignore_errors = true block for scripts.export

Out of scope

• os.environ workspace-path bypass (Monday PR 2 — Fix app.py and scripts/export.py CLI: switch to argparse, add --port/--host/--base-dir, fix default host, validate --since #4)
• Structured error codes / business-logic extraction / dual-model bridge (horizon, Brad)
• Any change to CLI export output format

Acceptance Criteria

• scripts/export.py calls a shared export-orchestration function instead of reimplementing workspace scanning, database reading, and composer processing
• Service-layer optimizations (summary cache, mtime fingerprinting) are available to both web and CLI paths
• The [[tool.mypy.overrides]] block for scripts.export with ignore_errors = true is removed
• scripts/export.py passes mypy --strict
• Existing CLI export tests continue to pass
• No behavioral change to CLI export output
• PR approved by at least 1 reviewer

Verification

cd C:\Users\Jasen\CppAliance\cppa-cursor-browser
.\.venv\Scripts\Activate.ps1
mypy --strict scripts/export.py
pytest -k export
python scripts/export.py --help