Release 0.8.6

[jonaslsaa]

Subagents can now run on a model you name, chat and import share one concurrency setting, and caching works behind proxies that use a 1h block TTL.

Features

• A spawn can set each task's model and thinking level when you ask for one, and a new models(provider?) tool lists the exact model ids you're logged in to, with the subagent default marked. Say "Opus" without a version and the agent picks the newest (Let a spawn set each task's model and thinking level #185). Thanks @aaaxn.
• One setting, "Summaries at once", now caps parallel summaries for both the live chat and imports, so providers with a concurrency limit no longer return 429s. The old importJobs setting is still read (Let one setting cap summaries at once for chat and import #190, fixes Limiting parallel compactions #186). Thanks @dtandersen for the report.

Fixes

• The cache end mark now goes on the request's last block instead of a top-level cache_control, so proxies that give block marks a 1h TTL no longer reject compactor requests with a 400 (Mark the request's end on its last block, so a 1h block TTL does not clash with a top-level 5m mark #187). Thanks @0xTomDaniel.
• Zooming into a live subagent now reads its retained messages, so its transcript doesn't come up short after Pi compacts it (Keep live subagent zoom readable after Pi compaction #182). Thanks @recallmenot.

Docs

• The README was rewritten user-first, with the recipe differences as a table and detail moved to docs/*.md (Make the README easier to read: user-first structure, recipe differences as a table #183).

[Copilot]

🟢 Approval recommended

All three version entries match, with no runtime or dependency changes and no unresolved findings.

No open issues 🎉

What changed in this PR

Prepares the 0.8.6 release by updating package metadata. The features and fixes described in the release notes are not changed by this diff.

Changes:

• Updates the package version from 0.8.5 to 0.8.6.
• Synchronizes both lockfile version entries.

File	Description
package.json	Sets the release version to 0.8.6.
package-lock.json	Aligns root and package versions with 0.8.6.

_{Review effort: Balanced}