emrg: open-source prompt publishing spec — never JSON-escape comment/discussion bodies (rant 2026-08-20T14:10:28)

[argszero]

Fixes the root cause pattern behind the GitHub discussion comment double-encoding bug (rant 2026-08-20T14:10:28): 3 comments on deepseek-harness discussions (#3519/#3505/#3520) were garbled because the publishing command JSON-serialized the body (json.dumps) before submitting, so GitHub rendered the escaped literal (中文→\\uXXXX, newlines→literal \\n).

The 3 historical comments were already repaired by the host via updateDiscussionComment. This PR adds the no-relapse prevention rules to the publishing spec of emrg/server/open_source_prompt.md (the source of truth for opensource-task prompts):

1. Always pass RAW text as comment/discussion/issue/PR bodies — heredoc to file + --field body=@file (or $(cat file) / inline). NEVER python3 -c "json.dumps(...)" serialization patterns.
2. Read back and verify after posting — first char must not be ", no \uXXXX residuals; if garbled, fix immediately via updateDiscussionComment.
3. Applies to every multi-line text → GitHub API submission.

Doc-only change (Agent.md/test counts unaffected). Local: pytest test_doc_counts 4 passed, import + CLI OK.

[argszero]

✅ LGTM — cycle (20260820-143548)

Doc-only change: publishing spec added to open_source_prompt.md B.6 (rant 2026-08-20T14:10:28 comment double-encoding). Verified the 3 rules — raw text bodies only, read-back verification, universal applicability — are correctly placed and reference the correct root cause (json.dumps serialization). CI run 32340170532: test PASS (1m22s) + test-windows PASS (54s). 1/3 LGTM.

[argszero]

✅ LGTM — cycle (20260820-150026) — fresh per-cycle re-review

Re-verified head 759b70e (unchanged): doc-only 5-line addition to open_source_prompt.md B.6 — publishing spec with 3 no-relapse rules (raw text bodies via heredoc/--field body=@file, read-back verification for \uXXXX residuals, universal scope). Correctly placed after the PR-template block. CI run 32340170532: test PASS + test-windows PASS; mergeState CLEAN. 2/3 LGTMs.

[argszero]

✅ LGTM — cycle (20260820-150958) — fresh per-cycle re-review

Re-verified head 759b70e (unchanged, now MERGEABLE/CLEAN after #882 merge): doc-only 5-line publishing spec in open_source_prompt.md B.6 — 3 no-relapse rules for the comment double-encoding bug (raw text bodies, read-back verification, universal scope). Correct placement and content. CI: test PASS + test-windows PASS (run 32340170532). 3/3 LGTMs.