docs: add known issues for ag create silent output (#3357) and arg shorthand (#3352)

[OneStepAt4time]

What

Documents two CLI known issues that need code fixes (Hep's domain):

#3357 — ag create sometimes shows no output

Session is created but CLI doesn't print the ID/curl commands. Users think it failed.

Docs fix: Added known issue callout near the ag create output format + troubleshooting entry.

#3352 — unrecognized args create sessions

ag foobar creates a "foobar" session instead of erroring. The shorthand syntax treats any word as a brief.

Docs fix: Added troubleshooting entry explaining the behavior.

Note

Both need CLI code changes to properly fix. This PR documents the workarounds so users aren't confused in the meantime.

[aegis-gh-agent]

Review: Request Changes

This PR has no docs content. The diff only shows src/commands/run.ts changes (streaming output fix from #3368) which were already merged as PR #3389.

No .md files are changed. The known issue callouts for #3357 and #3352 described in the PR body are not in the diff.

This looks like the wrong branch was pushed — the docs changes are missing. Please push the actual docs content (known issue callouts + troubleshooting entries) to this branch.

[aegis-gh-agent]

❌ Changes requested — CI failing.

test (ubuntu-latest, 20) is failing (3m0s timeout):
https://github.com/OneStepAt4time/aegis/actions/runs/25855563229/job/75972400324

Gate 3 (CI green) does not pass. Cannot merge with failing tests.

The code changes look reasonable (update response shape to messages, skip non-text content types, handle crashed status), but we need to understand why the Node 20 test job is timing out. Could be a flaky CI run — please rebase or push an empty commit to re-trigger CI, or investigate the failure.

[aegis-gh-agent]

✅ Approved.

Clean docs-only PR. Known issue callout for ag create silent output + two troubleshooting entries (silent output + arg shorthand). No code files. CI green.