fix(code-placeholders): make python bare-placeholder classification and tagged-template edits linear

[waleedlatif1]

Summary

• Python bare-placeholder classification answers its line-prefix rules from a per-file offset index instead of running regexes over the prefix for every placeholder
• Tagged-template nested edits are selected by bisection instead of a full scan per span
• Output is unchanged

Type of Change

• Bug fix

Testing

• Differential fuzz against the previous implementation: ~790k classifier calls and ~70k full compiles, identical output; mutation checks confirm the fuzz catches boundary changes
• Root bun run test, lint, type-check, check:audits, docs-manifest:check, block registry check

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing (new tests pass the test-audit authoring gate)
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

🤖 Generated with Claude Code

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Oct 4, 2026 6:14pm UTC

[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Re-trigger cubic}

[greptile-apps]

Confidence Score: 5/5

[Medium risk] Refactors code placeholder parsing for Python and JavaScript.

The PR appears safe to merge based on the reviewed changes.

Summary

The PR replaces repeated Python line-prefix classification with a per-file offset index and selects tagged-template nested edits by bisection. No new actionable issue was established.

_{Reviews (2) · Last reviewed commit: "fix(code-placeholders): make python bare..."}

[waleedlatif1]

@greptile

[waleedlatif1]

@cubic-dev-ai review this PR

[cubic-dev-ai]

@cubic-dev-ai review this PR

@waleedlatif1 I have started the AI code review. It will take a few minutes to complete.

[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Re-trigger cubic}