63 lines
3.2 KiB
Markdown
63 lines
3.2 KiB
Markdown
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# B2: per-profile plugin-enablement overlays — shipped + measured
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_Task: B2 in [system-prompt-profiles-tasks.md](system-prompt-profiles-tasks.md) ·
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2026-07-08 · Depends on C3 findings ([c3-spike-findings.md](c3-spike-findings.md))_
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## Pre-check result: `enabledPlugins` DEEP-MERGES
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The open item from C3 is resolved empirically (transcript `skill_listing` inspection, two
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headless haiku runs): a `--settings <overlay.json>` file's `enabledPlugins` is merged
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key-by-key into `~/.claude/settings.json` — only the plugins explicitly set `false`
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disappear (baseline 64 skills → 61, exactly the 3 skills of the 2 disabled plugins);
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unlisted plugins and all hooks are unaffected. **Diff-only overlays are safe.**
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## Shipped
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`~/.claude/profiles/` (see its README.md):
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- `cc-os-design.json` — disables rails-ui-component, api-wrapper, invoice-ninja,
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creative-team, dev-team
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- `client-dev.json` — disables creative-team, invoice-ninja, arch-refactor
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- `brainstorm.json` — disables all 9 coding/client plugins (adds ruby-lsp, codex,
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git-context, arch-refactor)
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Usage: `claude --settings ~/.claude/profiles/<name>.json`. Never combine with a
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`--setting-sources` list that omits `user` (silent plugin/hook drop — see vault note
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`claude-code-setting-sources-silent-plugin-drop`).
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## Measured savings (headless haiku, empty dir, 2026-07-08)
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| Run | Context tokens | Delta vs baseline |
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|---|---|---|
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| baseline (no overlay) | 29,045 | — |
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| cc-os-design (5 plugins off) | 29,013 | −32 |
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| brainstorm (9 plugins off) | 28,413 | −632 |
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**Honest verdict: token savings are marginal.**
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## Follow-on: YAGNI tool deny (2026-07-08, same session)
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Transcript sweep of all sessions since 2026-06-01 (tool_use counts across
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`~/.claude/projects/**/*.jsonl`): heavy use of Bash (7.7k) / Read (4.2k) / Edit (2.1k) /
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Agent (1.3k) / Write (1.2k); **zero-or-one lifetime calls** to Workflow, Artifact,
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SendUserFile, ReportFindings — all of which ship full schemas up front (not deferred).
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Measured (headless haiku, empty dir): disallowing Workflow alone −5,982 tokens
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(its schema ≈ the whole system-prompt text); all four −6,509. A `permissions.deny`
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block in a settings file removes the schemas identically to `--disallowedTools`
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(22,532 vs 22,536).
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**Applied globally** to `~/.claude/settings.json`:
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`"permissions": {"deny": ["Workflow", "Artifact", "SendUserFile", "ReportFindings"]}` —
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~6.5k saved every session, no flags needed. Revert by deleting the entry (needed if
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"ultracode"-style Workflow orchestration is ever wanted). This delivers the
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"`--tools` restriction is the real lever" prediction from the assessment; A1/A2's
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remaining value is now just the interactive-Fable confirmation. The assessment's "~4.8k user stack"
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is dominated by hooks/memsearch injection and per-plugin fixed listings, not by the
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skill descriptions the overlays remove — ToolSearch deferral already made plugin
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skills cheap. The remaining value of profiles is **focus** (no irrelevant slash
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commands/agents offered in a brainstorm session), not context cost. This further
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deprioritizes Wave 3 (aliases: trivial, do when friction is felt) and Group D
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(dropped), and shifts remaining token-diet attention to the memsearch injection
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(~1.5–3.9k/session, needs upstream fix — see b3-memsearch-injection-review.md).
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