Refresh 6 stale instruction files (#2133)

[KomalSrinivasan]

Picks up the 6 instruction files the Resource Staleness Report deep-reviewed and flagged with concrete problems. 4 "Targeted refresh" + 2 "Minor modernization". The remaining 716 stale files are bulk batch-commit noise per the report itself, so they stay out.

Changes

Targeted refresh

instructions/blazor.instructions.md

• C# 13 to C# 14 (C# 14 GA'd with .NET 10 in Nov 2025).
• Drop the "All unit testing must use Visual Studio Enterprise" mandate. Replaced with cross-IDE guidance so VS Code and Rider users aren't gated on a paid SKU.
• Swap "rely on Visual Studio's diagnostics tools" for dotnet-trace / dotnet-counters, which work cross-platform.

instructions/copilot-thought-logging.instructions.md

• Narrow applyTo from ** (every file in the repo) to **/Copilot-Processing.md.
• Replace 9 Windows-style \Copilot-Processing.md paths with POSIX ./Copilot-Processing.md so the workflow runs on macOS and Linux.

instructions/genaiscript.instructions.md

• Drop the "avoid exception handlers or error checking" line. It's actively unsafe advice for an AI to follow. Replaced with: handle errors at I/O and external API boundaries, let unexpected exceptions surface.

instructions/memory-bank.instructions.md

• Add the required description frontmatter (it was missing, which is a validation failure per AGENTS.md).
• Narrow applyTo from ** to memory-bank/** so it only fires in repos that actually use the pattern.
• Add an opt-in note up top so contributors know auxiliary files will be created in the workspace root.

Minor modernization

instructions/azure-functions-typescript.instructions.md

• Node.js v20 to v22 LTS (v22 is the current Azure Functions Node LTS).

instructions/localization.instructions.md

• Relative ../../issues link in the disclaimer to absolute https://github.com/github/awesome-copilot/issues so it resolves regardless of where the localized doc sits.

Auto-generated

docs/README.instructions.md got regenerated by npm run build to pick up the new memory-bank description. CI requires this stay in sync.

Verification

• npm install && npm run build exits 0. Generated marketplace.json with 96 plugins.
• grep -n '\\Copilot-Processing' instructions/copilot-thought-logging.instructions.md returns 0 matches.
• Diff is scoped to exactly 7 files. Nothing else touched.

Out of scope

• The 716 other "stale" files. The report itself notes they're dominated by batch commits and recommends a maintainer-side sweep, not a community PR.
• The 25 "aging" (14-30 day) files. Not flagged as problematic.
• bicep-code-best-practices, cmake-vcpkg, nextjs-tailwind, generate-modern-terraform-code-for-azure. The report explicitly says "no urgent change needed" on these.

Closes #2133 partial.

[github-actions]

🔒 PR Risk Scan Results

Scanned 7 changed file(s).

Severity	Count
🔴 High	0
🟠 Medium	0
ℹ️ Info	0

✅ No matching risk patterns were detected in changed files.

This is an automated soft-gate report. Findings indicate review targets and do not block merge by themselves.

[aaronpowell]

This is incorrect as it will make the instruction only apply when the agent is modifying the Copilot-Processing.md file, which is actually what the output of the instruction is trying to do.

[github-actions]

🟡 Contributor Reputation Check: MEDIUM risk

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Profile	MEDIUM
Credential audit	NONE

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[KomalSrinivasan]

Thanks @aaronpowell. Reverted applyTo back to '**' in a8a2b45 since the instruction's job is to create Copilot-Processing.md from any user request, not to fire only when that file is already open. The 5 other file edits in the PR (blazor C# 14 + cross-IDE, copilot-thought-logging POSIX paths, genaiscript error-handling, memory-bank description field, azure-functions-typescript Node 22, localization absolute issues link) are unchanged. Ready for another look.