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§ a19 phase-d

Token-efficient symbolic encoding

Compression of context/output. rtk-token-killer's PreToolUse Bash intercept won the field.

5 primary frameworks · 9 lower-confidence entries

Show 9 lower-confidence entriestier-b · tier-c · unknown · delta reports

These entries map to § a19 by tag but carry weaker evidence — fewer documented primitives, delta reports of absent skills, or marketing-only sites without a public repo. They're listed for completeness; treat them with appropriate caution.

rtk (Real Token Killer) ★ 55k
rtk-token-killer

Intercepts Claude Code's Bash tool calls at the PreToolUse hook and compresses verbose CLI output (git status, test runners, builds) by 60-90% before it enters …

Code-Mode Library ★ 1.5k
code-mode-library

Replaces traditional tool-calling with TypeScript code execution in a sandbox, collapsing N sequential tool calls into 1 code execution with all registered tool…

Context Engineering Kit ★ 1.0k
context-engineering-kit-neolabhq

Token-efficient multi-plugin engineering kit with automatic adversarial self-reflection and granular plugin installs.

Blueprint (JuliusBrussee) / cavekit ★ 948
blueprint-juliusbrussee

Compresses the entire SDD workflow into a single SPEC.md file using caveman encoding (~75% fewer tokens) with automatic bug-to-invariant backpropagation on test…

Claude Skills Marketplace (mhattingpete) ★ 586
claude-skills-marketplace-mhatting

Curated multi-plugin marketplace for SW engineering workflows with optional token-efficient code execution runtime for bulk file operations.

claude-code-bmad-skills ★ 435
claude-code-bmad-skills

Token-efficient re-implementation of BMAD-METHOD using Claude Code's native skill-md format with 3 lifecycle hooks and a project-level taxonomy for workflow rou…

OpenLore (formerly spec-gen) ★ 137
spec-gen

Give AI agents persistent architectural orientation by reverse-engineering OpenSpec living specs from code and exposing the graph via 45 MCP tools, reducing per…

Pare ★ 122
pare-mcp

28 MCP servers providing schema-validated JSON output for 240 developer tools, eliminating ANSI escape codes and fragile CLI output parsing with 36-95% token re…

gg (2-letter agent-native git client) ★ 0
gg-cyclecore

Reduce AI agent token consumption by 96–98% on git/npm/brew operations by acting as a deterministic command broker that returns structured MCP payloads instead …