Claude Code: Difference between revisions

Revision as of 14:13, 31 July 2025

Other articles
AI Development Tools AI Prompts & Agents AI Workflows & Patterns Claude Code Claude Code/Cheat Sheet Codex CLI Gemini CLI Local LLMs MCP Server Spec-Kit

Installation on Ubuntu (WSL2)

sudo apt install npm

mkdir -p ~/.npm-global
npm config set prefix ~/.npm-global
echo 'export PATH=~/.npm-global/bin:$PATH' >> ~/.bashrc
source ~/.bashrc

npm install -g @anthropic-ai/claude-code

which claude
claude doctor
claude --version

Memory

https://docs.anthropic.com/en/docs/claude-code/memory


	file
Project memory	`$PROJECT_DIR/CLAUDE.md`
User memory	`~/.claude/CLAUDE.md`
~~Local project memory~~	`$PROJECT_DIR/CLAUDE.local.md` deprecated

Sub agents


	file
User sub agents	`~/.claude/agents/`
Project sub agents	`$PROJECT_DIR/.claude/agents/`

Example sub agents:
- https://github.com/wshobson/agents

Custom commands


	file
User commands	`~/.claude/commands/`
Project commands	`$PROJECT_DIR/.claude/commands/`

MCP Server

claude mcp list
claude mcp add <name> <command> [args...]
claude mcp get my-server
claude mcp remove my-server

Scope
	file		CLI switch
Local MCP Server	`~/.claude.json`	default	-s local
Project MCP server	`$PROJECT_DIR/.mcp.json`		-s project
User MCP Server	`~/.claude.json`		-s user

settings.json

https://docs.anthropic.com/en/docs/claude-code/settings


	file	scope
User settings	`~/.claude/settings.json`
Project settings	`$PROJECT_DIR/.claude/settings.json`	all users
Project settings	`$PROJECT_DIR/.claude/settings.local.json`	local/personal only

Example:

{
  "permissions": {
    "allow": [
      "Bash(ls:*)"
    ],
    "deny": []
  }
}

Hook example:

  "hooks": {
    "UserPromptSubmit": [
      {
        "hooks": [
          {
            "type": "command",
            "command": ".claude/hooks/prompt-validator.py"
          }
        ]
      }
    ]
  }

Command line options

claude                                   # interactive mode
claude "task"                            # run single task
claude -p "task"                         # run single task, print response, exit
claude --dangerously-skip-permissions

claude config list
claude doctor
claude update

Learning Videos


	Description	Channel	URL
1.	Basics	Matt Maher	https://www.youtube.com/watch?v=T_IYHx-9VGU
2.	Best practices	Matt Maher	https://www.youtube.com/watch?v=IUi--nVU4yA

H	Hooks	IndyDevDan	https://www.youtube.com/watch?v=J5B9UGTuNoM
H	Hooks 2	IndyDevDan	https://www.youtube.com/watch?v=9ijnN985O_c
		IndyDevDan	https://github.com/disler/claude-code-hooks-mastery

S	Sub agents	Matt Maher	https://www.youtube.com/watch?v=6MLyc3jYisQ
S	Sub agents	IndyDevDan	https://www.youtube.com/watch?v=7B2HJr0Y68g

Channels
- Matt Maher: https://www.youtube.com/@MetalSole
- IndyDevDan: https://www.youtube.com/@indydevdan/

@@ Line 36: / Line 36: @@
 |-
 |Project memory
-|<code>./CLAUDE.md</code>
+|<code>$PROJECT_DIR/CLAUDE.md</code>
 |-
 |User memory
@@ Line 42: / Line 42: @@
 |-
 |<s>Local project memory</s>
-|<code><s>./CLAUDE.local.md</s></code> deprecated
+|<code><s>$PROJECT_DIR/CLAUDE.local.md</s></code> deprecated
 |}
@@ Line 55: / Line 55: @@
 |-
 |Project sub agents
-|<code>.claude/agents/</code>
+|<code>$PROJECT_DIR/.claude/agents/</code>
 |}
 * Example sub agents:
@@ Line 70: / Line 70: @@
 |-
 |Project commands
-|<code>.claude/commands/</code>
+|<code>$PROJECT_DIR/.claude/commands/</code>
 |}
@@ Line 91: / Line 91: @@
 |-
 |Project MCP server
-|<code>.mcp.json</code>
+|<code>$PROJECT_DIR/.mcp.json</code>
 |
 | -s project
@@ Line 114: / Line 114: @@
 |-
 |Project settings
-|<code>.claude/settings.json</code>
+|<code>$PROJECT_DIR/.claude/settings.json</code>
 |all users
 |-
 |Project settings
-|<code>.claude/settings.local.json</code>
+|<code>$PROJECT_DIR/.claude/settings.local.json</code>
 |local/personal only
 |}