{
  "id": "agentVersion:claude:2-1-159",
  "_kind": "AgentVersion",
  "_file": "agent-stack/agent-versions/claude-code-2-1-159-2026-05-31.yaml",
  "_cluster": "agent-stack",
  "attributes": {
    "agentId": "claude",
    "agentProductId": "agent:claude-code",
    "displayName": "Claude Code 2.1.159",
    "runtimeFamily": "cli-harness",
    "releaseChannel": "stable",
    "versionRange": "2.1.159",
    "currentVersion": "2.1.159",
    "releasedAt": "2026-05-31",
    "sourcePackage": "@anthropic-ai/claude-code",
    "upstreamReleaseTag": "v2.1.159",
    "releaseNotesUrl": "https://github.com/anthropics/claude-code/releases/tag/v2.1.159",
    "cliCommand": "claude",
    "summary": "Claude Code stable release with no user-facing changes in 2.1.159; recent 2.1.x line added Opus 4.8 workflows, local skills plugins, agent dispatch metadata, and auto mode provider coverage.",
    "assimilationNotes": [
      "2.1.159 itself is documented as internal infrastructure improvements with no user-facing changes.",
      "Recent 2.1.x releases added dynamic workflows surfaced by /workflows; workflow/session orchestration metadata should be watched by launch and session mappers.",
      "Plugins in .claude/skills are automatically loaded and `claude plugin init <name>` scaffolds a local plugin, affecting plugin discovery assumptions.",
      "`claude agents` now honors the `agent` field in settings.json and adds `--agent <name>` override behavior for dispatched sessions.",
      "`tool_decision` telemetry events include `tool_parameters` when OTEL_LOG_TOOL_DETAILS=1, exposing bash commands and MCP/skill names for observability mapping.",
      "Auto mode is available on Bedrock, Vertex, and Foundry for Opus 4.7 and Opus 4.8 behind CLAUDE_CODE_ENABLE_AUTO_MODE=1.",
      "No package rename, install method change, or migration step was published for 2.1.159; installation remains npm install -g @anthropic-ai/claude-code."
    ],
    "releaseHighlights": [
      "Internal infrastructure improvements in v2.1.159.",
      "Recent v2.1.x: Opus 4.8, dynamic workflows, .claude/skills plugin loading, plugin init, settings.json agent dispatch, telemetry tool_parameters, and auto mode provider support."
    ],
    "installMethods": [
      "install:npm"
    ],
    "launchBehavior": {
      "promptExtraFlags": [
        {
          "flag": "--agent",
          "valueName": "name",
          "appliesTo": "claude agents dispatched sessions",
          "introducedIn": "2.1.157",
          "notes": "Overrides the `agent` field honored from settings.json for dispatched Claude agent sessions."
        }
      ]
    },
    "pluginDiscovery": {
      "autoLoadedSkillDirectories": [
        ".claude/skills"
      ],
      "scaffoldCommands": [
        "claude plugin init <name>"
      ],
      "introducedIn": "2.1.157",
      "notes": "Local .claude/skills plugin auto-loading means plugin discovery should not require marketplace installation."
    },
    "workflowSurface": {
      "slashCommand": "/workflows",
      "introducedIn": "2.1.154",
      "orchestrationKind": "dynamic-background-agents",
      "notes": "Dynamic workflows let Claude create workflows and orchestrate many background agents; /workflows views active runs."
    },
    "telemetry": {
      "toolDecisionParameters": {
        "eventName": "tool_decision",
        "field": "tool_parameters",
        "envVar": "OTEL_LOG_TOOL_DETAILS",
        "enabledValue": "1",
        "introducedIn": "2.1.157",
        "notes": "When enabled, telemetry includes bash commands and MCP/skill names; downstream mappings may expose the field with privacy controls."
      }
    },
    "minSchemaVersion": "6.0.0"
  },
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    {
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