fix(code-placeholders): skip heredoc bodies when scanning shell quote context

[waleedlatif1]

Summary

• Shell quote-context scanning now skips heredoc bodies, so quote characters in body text no longer desync quoting for the code after them
• Unquoted heredoc bodies are scanned on their own for env reads

Type of Change

• Bug fix

Testing

• Added regression tests in compiler.test.ts (fail on the pre-fix code); code-placeholders suite passes
• bun run lint, bun run type-check, bun run 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)

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Oct 3, 2026 7:25pm 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] Fixes shell quote context scanning around heredoc blocks.

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

Summary

The PR prevents heredoc body text from changing the quote context used to scan subsequent shell code. It also scans unquoted heredoc bodies separately for environment reads and adds regression tests for both behaviors.

_{Reviews (2) · Last reviewed commit: "fix(code-placeholders): skip heredoc bod..."}

[waleedlatif1]

@greptile

[waleedlatif1]

@cubic-dev-ai review this PR

[cubic-dev-ai]

@cubic-dev-ai review this PR

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[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}