[v0.8 Prompts P02] add clear direct prose guidance

[sethkarten]

P02 — clear direct prose guidance (child of P01)

Published main-topology child head: 6839d49bce9cadb463aaa3004e51ca65b0fc7d15
Base: v080/prompts at P01 head 1a53c7064c8689f39c56da4639be7df1738fbc8e.
Ordered parents: prior P02 d46d605ce56bfaa126d138d09db60d9b49dc72de, then main-based P01 1a53c7064c8689f39c56da4639be7df1738fbc8e.
Incremental scope: only packages/coding-agent/test/system-prompt.test.ts; raw reviewed P02 patch preserved byte-for-byte (SHA-256 aa3155112eda411030bd6ff5ea291c4cfdd719fa0b002e30d0d8bab981f04dc3).

Adds the literal built-in clear-direct-prose block and deterministic full-prompt coverage. Typed P01 provenance ensures custom including empty/lookalike content receives none and unknown fails closed. Independent Terra review accepted the final child tree; neutral validation passes 59/59 and root type-check passes. Merge only after P01.

Note

Add strict full-string equality assertion to buildRlmPrompt system prompt test

Replaces substring containment checks in system-prompt.test.ts with a single toBe assertion against the complete expected prompt string, covering all guidance sections and runtime context lines. Imports DEFAULT_RLM_EXTRA_IMPORT_LABELS from the bootstrap module to dynamically build the pre-installed packages line in the expected output. Risk: any change to the prompt text, including whitespace or ordering, will now fail the test.

^{Macroscope summarized 6839d49.}

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Note

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