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Claude Mastery
Daily newsletter on becoming the best Claude Code operator there is. CLI power moves, agent architecture, operator thinking, ecosystem intel, and hands-on practice labs.
9
Issues
47
Topics
5
Categories
CLI: 10
Ecosystem: 10
Agent: 9
Operator: 9
Lab: 9
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Archive
All Posts
#9
Apr 11, 2026
Weekend Deep Dive
7 topics
·
avg quality 4.1/5
CLIv2.1.101 — The Biggest Bug-Fix Release Yet
CLIThe Monitor Tool — From Polling Loops to Event-Driven Agents
AgentThe Advisor Strategy — Opus as On-Demand Strategist
OperatorFour Runtime Patterns from Claude Code's Source
EcosystemAgentLint — 68 Hook Rules, Zero LLM Calls
EcosystemTwill.ai — Cloud Agents That Deliver Pull Requests
LabBuild an Advisor-Powered Code Review Pipeline
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#8
Apr 10, 2026
Weekday Edition
5 topics
·
avg quality 3.4/5
CLIv2.1.98 Patched Six Bash Permission Bypasses
AgentSubprocess Sandboxing: PID Isolation and Script Caps
OperatorPlugin Trust After the Vercel Telemetry Scandal
EcosystemEngram: Zero-Dep Persistent Memory in a Single Go Binary
LabAudit Your Installed Plugins for Telemetry Leaks
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#7
Apr 9, 2026
Weekday Edition
5 topics
·
avg quality 3.2/5
CLIFocus View — The Three-State Terminal Navigator
Agentv2.1.97 Fixed Four Agent-Killing Bugs
OperatorDesign for Resumability — Lessons from 7 Resume Fixes
Ecosystemclaude-on-a-leash: Deterministic Security Without Sandbox Overhead
LabMaster the Three-State Navigator in 10 Minutes
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#6
Apr 8, 2026
Weekday Edition
5 topics
·
avg quality 3.4/5
CLIAuto-Name Sessions with hookSpecificOutput.sessionTitle
AgentSandbox Your Agents: Runtime Isolation with Bubblewrap and Firejail
OperatorAgent = Model + Harness: The Mental Model That Changes Everything
EcosystemKerf-CLI: SQLite-Backed Cost Intelligence for Claude Code
LabSandbox Claude Code with Bubblewrap in 10 Minutes
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#5
Apr 7, 2026
Weekday Edition
5 topics
·
avg quality 3.2/5
CLIclaude-profile: Run Multiple Subscriptions Side by Side
AgentThe LLM Wiki Pattern: Compile Knowledge That Compounds Across Sessions
OperatorThe Skill Metadata Budget: Why 33% of Your Skills Are Invisible
EcosystemRepowise: Codebase Intelligence That Goes Beyond File Reading
LabIndex Your Codebase with Repowise's Four Intelligence Layers
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#4
Apr 6, 2026
Weekday Edition
5 topics
·
avg quality 3.2/5
CLI/cost Per-Model and Cache-Hit Breakdown
AgentMCP Context Optimization: Tool Search and Result Persistence
OperatorSilent Fake Success — The Deadliest Agent Failure Mode
EcosystemVibeAround: Telegram-to-Claude-Code with Session Handover
LabAudit Your Agents for Silent Fake Success
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#3
Apr 5, 2026
Weekend Deep Dive
5 topics
·
avg quality 4.6/5
CLIUltraplan: The Cloud-to-Terminal Planning Bridge
AgentCustom Subagent Masterclass: 17 Fields, 5 Scopes, Full Autonomy
Operator~/.claude/ Security Audit: Structure Is Not Security
EcosystemConductor: Multi-Session Orchestration via MCP + Remote Control API
LabBuild a Security-Hardened Custom Subagent Fleet
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#2
Apr 4, 2026
Weekend Deep Dive
5 topics
·
avg quality 4.4/5
CLIHooks Masterclass: 26 Events, Conditional Logic, and Production Chains
AgentAgent Teams: Multi-Session Orchestration with Shared Tasks
OperatorWalls Beat Signs: Why CLAUDE.md Rules Fail Under Pressure
EcosystemRemembrallMCP: Persistent Code Intelligence That Cuts Token Usage by 98%
LabBuild a Hook-Based Agent Supervision Framework
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#1
Apr 3, 2026
Weekday Edition
5 topics
·
avg quality 3.4/5
CLIRate Limit Monitoring in the Statusline
AgentThe defer Hook — Pause-and-Resume for Headless Agents
OperatorCLAUDE.md as Attention Budget — The 150-Instruction Ceiling
EcosystemOpenAI Ships a Codex Plugin for Claude Code
LabBuild a Rate Limit Fuel Gauge
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