Limit step summary size to 1000KB and add lightweight console summary

[Copilot]

GitHub Actions step summaries were exceeding the 1024KB limit, causing workflow failures. Additionally, full markdown output was being sent to core.info() which is suboptimal for raw console rendering.

Changes

• Size limits: MAX_STEP_SUMMARY_SIZE reduced from 8MB to 1000KB; MAX_TOOL_OUTPUT_LENGTH reduced from 500 to 256 chars
• Plain text summary: New generatePlainTextSummary() function produces console-optimized output for core.info()
• Parser updates: Copilot and Claude parsers now return logEntries for use in plain text generation
• Test fix: TestNeutralToolsIntegration now checks for YAML keys specifically, avoiding false positives from bundled JS string literals

Plain text summary format

=== Copilot Execution Summary ===
Model: gpt-5
Turns: 3
Duration: 1m 30s
Tokens: 1,000 in / 500 out

Tools/Commands:
  [✓] bash: echo test
  [✓] github::create_issue
  [✗] github::list_issues

Tools: 2/3 succeeded

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/user
  • Triggering command: /usr/bin/gh gh api user --jq .login (http block)
  • Triggering command: /usr/bin/gh gh api user --jq .login g/workflow/js/node_modules/vitest/dist/workers/forks.js (http block)
  • Triggering command: /usr/bin/gh gh api user --jq .login _main.o (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

When parsing a log (in JavaScript ) and building the job summary,

• limit total markdown size to 1000kb

Error: $GITHUB_STEP_SUMMARY upload aborted, supports content up to a size of 1024k, got 2822k. For more information see: https://docs.github.com/actions/using-workflows/workflow-commands-for-github-actions#adding-a-markdown-summary

• limit tool output preview size to 256characters
• generate a lightweight summary to send to core.info that is more optimized for raw text rendering

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