feat: add agent name annotation to AI agent config materials

[jiparis]

Summary

• Extract the agent name (e.g., "claude", "cursor") from CHAINLOOP_AI_AGENT_CONFIG material JSON payload and surface it as a chainloop.material.aiagent.name annotation
• This makes the agent name queryable/filterable without downloading and parsing the full evidence content

┌───────────────────────────┬──────────────────────────────────────┐
│ Initialized At            │ 14 Mar 26 23:43 UTC                  │
├───────────────────────────┼──────────────────────────────────────┤
│ Attestation ID            │ 1d0b88fa-08ff-42fa-941b-d50e73d9df22 │
│ Organization              │ my-org                               │
│ Name                      │ aiworkflow                           │
│ Project                   │ my-project                           │
│ Version                   │ v1.82.0+next (prerelease)            │
│ Contract                  │ my-project-aiworkflow (revision 1)   │
│ Policy violation strategy │ ENFORCED                             │
└───────────────────────────┴──────────────────────────────────────┘
┌───────────────────────────────────────────────────────────────────────────────────────┐
│ Materials                                                                             │
├─────────────┬─────────────────────────────────────────────────────────────────────────┤
│ Name        │ ai-agent-config-claude                                                  │
│ Type        │ CHAINLOOP_AI_AGENT_CONFIG                                               │
│ Set         │ Yes                                                                     │
│ Required    │ No                                                                      │
│ Value       │ ai-agent-config-claude-358303667.json                                   │
│ Digest      │ sha256:597d9533e18b09803e8e2834fa1aa9647511b082ecbbcec1649c0e9d37f263db │
│ Annotations │ ------                                                                  │
│             │ chainloop.material.aiagent.name: claude                                 │
│             │ chainloop.material.size: 47950                                          │
└─────────────┴─────────────────────────────────────────────────────────────────────────┘

[cubic-dev-ai]

2 issues found across 4 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="pkg/attestation/crafter/materials/testdata/ai-agent-config-claude.json">

<violation number="1" location="pkg/attestation/crafter/materials/testdata/ai-agent-config-claude.json:9">
P3: This fixture's `sha256`/`size` values do not match its embedded `content`, so it models impossible AI-agent evidence.</violation>
</file>

<file name="pkg/attestation/crafter/materials/testdata/ai-agent-config-cursor.json">

<violation number="1" location="pkg/attestation/crafter/materials/testdata/ai-agent-config-cursor.json:9">
P2: Fix the fixture metadata so `sha256` and `size` match the decoded `content`. Right now this testdata describes `# Coding Rules`, but the hash and size are for different bytes.</violation>
</file>

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