refactor: Remove concatenated module second parse

[LingyuCoder]

Summary

Remove the codegen-time second parse/analyze pass from concatenated module generation.

This moves the required scope-hoisting metadata to parser/codegen metadata and pre-allocates stable names through ConcatenationScope, so dependency templates can obtain deterministic aliases without reparsing the rendered module source. The ESM library render path is updated along the same lines, and namespace/import/template export handling now registers generated symbols through the shared scope machinery.

Notes

• Snapshot updates are expected from the new stable name allocation, namespace object rendering, and related hash changes.
• The old diagnostic case that asserted concatenated-module post-codegen parse failure was removed because that parse path no longer exists.
• The branch was recreated from latest origin/main to avoid carrying an unrelated local commit.

Validation

• pnpm run build:cli:dev
• pnpm run test:unit
• git diff --check origin/main...HEAD

One initial full test:unit run hit a CLI serve stdout timing failure; rerunning that file passed, and the following full test:unit run passed.

[github-actions]

📦 Binary Size-limit

Comparing 14ec209 to feat: inline const with module declarations (#14032) by Gengkun

🎉 Size decreased by 300.00KB from 61.95MB to 61.66MB (⬇️0.47%)

[codspeed-hq]

Merging this PR will degrade performance by 5.9%

⚡ 1 improved benchmark
❌ 7 regressed benchmarks
✅ 26 untouched benchmarks
⏩ 25 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	rust@build_module_graph	925.2 ms	957.2 ms	-3.34%
❌	Simulation	rust@runtime_requirements	34.7 ms	36.6 ms	-5.24%
❌	Simulation	bundle@basic-react-development	308.1 ms	321.8 ms	-4.27%
❌	Simulation	bundle@threejs-development	258 ms	270.1 ms	-4.5%
⚡	Simulation	bundle@threejs-production-sourcemap	387.4 ms	322.6 ms	+20.09%
❌	Simulation	rust@concatenate_module_code_generation	99.8 ms	122.8 ms	-18.73%
❌	Simulation	rust@persistent_cache_restore@basic-react-development	15.8 ms	18 ms	-12%
❌	Simulation	rust@persistent_cache_restore_after_single_file_change@basic-react-development	16.6 ms	19.4 ms	-14.54%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing codex/concat-no-second-parse-main (14ec209) with main (1f4032a)}

Footnotes

1. 25 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[github-actions]

Rsdoctor Bundle Diff Analysis

Found 6 projects in monorepo, 6 projects with changes.

📊 Quick Summary

Project	Total Size	Change
popular-libs	1.7 MB	-
react-10k	5.7 MB	-
react-1k	826.3 KB	-
rome	1.6 MB	-
react-5k	2.7 MB	-
ui-components	4.8 MB	-

📋 Detailed Reports (Click to expand)

📁 popular-libs

Path: ../build-tools-performance/cases/popular-libs/dist/rsdoctor-data.json

⚠️ No baseline data found - Unable to perform comparison analysis

Metric	Current	Baseline	Change
📊 Total Size	1.7 MB	-	-
📄 JavaScript	1.7 MB	-	-
🎨 CSS	0 B	-	-
🌐 HTML	289.0 B	-	-
📁 Other Assets	0 B	-	-

📁 react-10k

Path: ../build-tools-performance/cases/react-10k/dist/rsdoctor-data.json

⚠️ No baseline data found - Unable to perform comparison analysis

Metric	Current	Baseline	Change
📊 Total Size	5.7 MB	-	-
📄 JavaScript	5.7 MB	-	-
🎨 CSS	21.0 B	-	-
🌐 HTML	328.0 B	-	-
📁 Other Assets	0 B	-	-

📁 react-1k

Path: ../build-tools-performance/cases/react-1k/dist/rsdoctor-data.json

⚠️ No baseline data found - Unable to perform comparison analysis

Metric	Current	Baseline	Change
📊 Total Size	826.3 KB	-	-
📄 JavaScript	826.0 KB	-	-
🎨 CSS	0 B	-	-
🌐 HTML	328.0 B	-	-
📁 Other Assets	0 B	-	-

📁 rome

Path: ../build-tools-performance/cases/rome/dist/rsdoctor-data.json

⚠️ No baseline data found - Unable to perform comparison analysis

Metric	Current	Baseline	Change
📊 Total Size	1.6 MB	-	-
📄 JavaScript	1.6 MB	-	-
🎨 CSS	0 B	-	-
🌐 HTML	0 B	-	-
📁 Other Assets	0 B	-	-

📁 react-5k

Path: ../build-tools-performance/cases/react-5k/dist/rsdoctor-data.json

⚠️ No baseline data found - Unable to perform comparison analysis

Metric	Current	Baseline	Change
📊 Total Size	2.7 MB	-	-
📄 JavaScript	2.7 MB	-	-
🎨 CSS	21.0 B	-	-
🌐 HTML	328.0 B	-	-
📁 Other Assets	0 B	-	-

📁 ui-components

Path: ../build-tools-performance/cases/ui-components/dist/rsdoctor-data.json

⚠️ No baseline data found - Unable to perform comparison analysis

Metric	Current	Baseline	Change
📊 Total Size	4.8 MB	-	-
📄 JavaScript	4.7 MB	-	-
🎨 CSS	107.0 KB	-	-
🌐 HTML	328.0 B	-	-
📁 Other Assets	0 B	-	-

Generated by Rsdoctor GitHub Action