[docs] Fix 175 non-standard code fence closing markers across 20 scratchpad spec files

[github-actions]

Comprehensive formatting fix for non-standard code fence closing markers found across 20 specification files in scratchpad/.

Problem

The [CommonMark spec]((spec.commonmark.org/redacted) requires that closing code fences have no info string. A line like ```text used as a closing fence is technically invalid because text is an info string. While GitHub's renderer may tolerate this, it creates inconsistency and may cause rendering issues in other markdown tools.

Example of the problem found throughout spec files:

func someFunc() {
    // code
}
```text     ← WRONG: closing fence has info string

Should be:

func someFunc() {
    // code
}
```         ← CORRECT: no info string on closing fence

Changes Made

Fixed 175 non-standard closing fences across 20 spec files:

File	Fixes
scratchpad/github-actions-security-best-practices.md	34
scratchpad/safe-output-messages.md	33
scratchpad/string-sanitization-normalization.md	14
scratchpad/mcp_logs_guardrails.md	12
scratchpad/actions.md	11
scratchpad/security_review.md	8
scratchpad/go-type-patterns.md	4
scratchpad/end-to-end-feature-testing.md	4
scratchpad/firewall-log-parsing.md	4
scratchpad/template-injection-prevention.md	4
scratchpad/mods/jsonschema-go.md	4
scratchpad/validation-architecture.md	18
scratchpad/schema-validation.md	3
scratchpad/breaking-cli-rules.md	3
scratchpad/changesets.md	5
scratchpad/testing.md	5
scratchpad/safe-output-environment-variables.md	2
scratchpad/gosec.md	2
scratchpad/code-organization.md	2
scratchpad/capitalization.md	1

Also updated scratchpad/dev.md to version 3.1 with a change history entry.

Validation

• Automated script parsed all markdown files tracking code block open/close language tags
• Only changed ```text closing fences that were closing blocks opened with non-text language tags
• Preserved 3 legitimate nested code blocks inside ```markdown documentation examples
• Verified no content changes — pure closing fence corrections only

Review Notes

Each changed line was exactly ```text → ``` (or the appropriate bare closing fence). No code content was modified. The fix is purely syntactic conformance to the CommonMark specification.

References: §22421430881

Generated by Developer Documentation Consolidator

• expires on Feb 28, 2026, 12:10 AM UTC

---

---

✨ PR Review Safe Output Test - Run 22422877284

💥 [THE END] — Illustrated by Smoke Claude

[github-actions]

Commit pushed: b1daeb0

💥 [THE END] — Illustrated by Smoke Claude