v0.11.0

Effort accuracy fix plus a Workflows chapter. Docs only - no pin, config, hook, or stats changes.

• Corrected a stale claim: the skill and README stated that Anthropic's quality-first guidance for Opus-class models starts coding and agentic work at xhigh. That is the Opus 4.7/4.8 recommendation. Opus 5 is told to start at high, step up to xhigh for demanding coding and agentic work, and use low/medium liberally as the primary cost control - the generation this plugin has targeted since 0.9.0. The text now names which generation each recommendation belongs to and says to re-sweep effort after a model change.
• Effort is documented as shaping all response tokens, tool calls included: at lower effort the model makes fewer tool calls, so a cheap pin saves twice. low's own documented use case is subagents.
• Sonnet 5 at medium is comparable to Sonnet 4.6 at high - stated next to the sonnet/medium pins, which that comparison justifies.
• Prompt-cache caveat: changing effort between requests invalidates the cached prefix, so effort should vary across workloads (per-agent pins, per-agent() opts) rather than inside one conversation.
• New ## Workflows chapter in the skill: the breadth-vs-chain boundary, per-stage routing with CLAUDE_CODE_SUBAGENT_MODEL precedence, granularity as saved progress on resume, the /config size guideline (default medium since Claude Code 2.1.219), the 25-agent / 1.5M-token warning and the 16-concurrent / 1000-total runtime caps, and the acceptEdits permission note for workflow subagents. The ## Rules bullet that restated part of this is now a pointer at the chapter.
• README: workflow cost settings and the ultracode stance in Recommended settings; the 0.10.0 report caps now cite the 1,000-2,000 token subagent-summary shape; the old "Workflow use" section is renamed "Superpowers flow" so the word "workflow" means one thing.
• SKILL.md grew 2377 -> 2973 words. Deliberate: the skill is charged per invoke, and the routing anchor - charged every session - was not touched.