Learn Claude Code

Learning Path

s01 to s12: Progressive Agent Design

Layer Legend

Tools & Execution
Planning & Coordination
Memory Management
Concurrency
Collaboration
01
s01Single-tool agent loop

The Agent LoopBash is All You Need

123 lines of code1 tools

The minimal agent kernel is a while loop + one tool

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02
s02Tool dispatch map

ToolsOne Handler Per Tool

162 lines of code4 tools

The loop stays the same; new tools register into the dispatch map

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03
s03TodoManager + nag reminder

TodoWritePlan Before You Act

232 lines of code5 tools

An agent without a plan drifts; list the steps first, then execute

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04
s04Subagent spawn with isolated messages[]

SubagentsClean Context Per Subtask

170 lines of code5 tools

Subagents use independent messages[], keeping the main conversation clean

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05
s05SkillLoader + two-layer injection

SkillsLoad on Demand

202 lines of code5 tools

Inject knowledge via tool_result when needed, not upfront in the system prompt

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06
s06micro-compact + auto-compact + archival

CompactThree-Layer Compression

216 lines of code5 tools

Context will fill up; three-layer compression strategy enables infinite sessions

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07
s07TaskManager with file-based state + dependency graph

TasksTask Graph + Dependencies

225 lines of code8 tools

A file-based task graph with ordering, parallelism, and dependencies -- the coordination backbone for multi-agent work

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08
s08BackgroundManager + notification queue

Background TasksBackground Threads + Notifications

188 lines of code6 tools

Run slow operations in the background; the agent keeps thinking ahead

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09
s09TeammateManager + file-based mailbox

Agent TeamsTeammates + Mailboxes

370 lines of code11 tools

When one agent can't finish, delegate to persistent teammates via async mailboxes

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10
s10request_id correlation for two protocols

Team ProtocolsShared Communication Rules

440 lines of code13 tools

One request-response pattern drives all team negotiation

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11
s11Task board polling + timeout-based self-governance

Autonomous AgentsScan Board, Claim Tasks

540 lines of code15 tools

Teammates scan the board and claim tasks themselves; no need for the lead to assign each one

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12
s12Composable worktree lifecycle + event stream over a shared task board

Worktree + Task IsolationIsolate by Directory

603 lines of code16 tools

Each works in its own directory; tasks manage goals, worktrees manage directories, bound by ID

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LOC Growth

s01
123
s02
162
s03
232
s04
170
s05
202
s06
216
s07
225
s08
188
s09
370
s10
440
s11
540
s12
603