v0.26.0 — context push default ON + trigger hints

v0.26.0 — UserPromptSubmit context push default ON + trigger hints

Changed

• claude-plugin/scripts/user-prompt-context.js: computeQuietHooks default
  flipped back to noisy (push ON). The v0.21 opt-in flip cited routing-bench
  P@1=100% as evidence the agent already picks tools correctly without push,
  but that bench measures triage accuracy once the agent has decided to query
  a tool — not the prior question of whether the agent reaches for a tool at
  all. The real counter-evidence is in pre-grep-guide.js's 15-day baseline:
  429 raw grep vs 191 functional CLI calls on the same indexed source tree
  (~13× pre-training bias toward grep). Push is the corrective. Per-type
  cooldowns (impact 30s / overview 5min / callgraph 60s / search 60s) cap
  frequency; the 8-char message floor + shouldSkip filter keep confirmation
  chatter silent. Escape hatch: CODE_GRAPH_QUIET_HOOKS=1.
• claude-plugin/scripts/pre-edit-guide.js: caller threshold lowered from
  directCallers < 2 to < 1. Editing any function with one or more callers
  now surfaces the one-line impact summary; the per-symbol 2-minute cooldown
  is unchanged so the noise floor stays the same.
• SessionStart project_map injection (session-init.js) stays default
  OFF — that hook is a static dump duplicated by MEMORY.md's decision
  table; this hook is a reactive trigger reminder. The two defaults are
  intentionally asymmetric.

Added

• src/mcp/server/mod.rs MCP instructions field gains one line of explicit
  scenario triggers: "who calls X?" → get_call_graph; "impact of X?" or before editing a fn → get_ast_node include_impact=true; concept search without an exact symbol → semantic_code_search. Compile-time
  assert!(NOISY.len() <= 1500) budget guard unchanged (now 772 / 1500 bytes).
• Project CLAUDE.md "Code Graph Integration" section replaced with a 5-row
  trigger table (who calls / impact / module overview / concept search / HTTP
  route) — CLAUDE.md is loaded every session, higher priority than the
  invited-memory path in MEMORY.md.
• claude-plugin/templates/plugin_code_graph_mcp.md clarifies the asymmetric
  hook defaults and lists CODE_GRAPH_QUIET_HOOKS=1 as the context-push
  escape hatch alongside the existing VERBOSE_HOOKS / QUIET_HOOKS=0 flags.

Rationale anchor

• mem #8234 documents that hook content has bounded leverage when the
  current bench corpus is saturated (Sonnet 4.5 hits P@1=100%); bench is the
  right oracle for tool-description boundary disambiguation, not for
  server-prelude / hook-content tuning. This release therefore lands without
  a fresh routing-bench cycle — the changes are all hook-content surface.

Verification

• cargo check: clean (compile-time assert!(len <= 1500) on
  NOISY instructions string holds; final length ~772 bytes).
• node --test claude-plugin/scripts/user-prompt-context.test.js:
  77/77 pass — six computeQuietHooks priority-chain cases rewritten for
  the default-noisy invariant; one e2e check kept on the =1 escape hatch.
• No change to routing_bench.rs corpus; intentionally skipped per mem #8234.

Migration

• Existing users on default env will start seeing [code-graph:impact| overview|callgraph|search] push lines on intent-matching prompts. Set
  CODE_GRAPH_QUIET_HOOKS=1 in ~/.claude/settings.json env to opt out.
• Adopted projects: the plugin_code_graph_mcp.md template auto-refreshes on
  next SessionStart (unless CODE_GRAPH_NO_TEMPLATE_REFRESH=1 is set).
• No data-migration, no schema change, no MCP tool API change.

Full Changelog: v0.25.1...v0.26.0