## ADDED Requirements

### Requirement: Agent llama_flags frontmatter field
The system SHALL parse a `llama_flags` string field from agent AGENTS.md frontmatter.

#### Scenario: Agent with llama_flags set
- **GIVEN** an agent with `llama_flags: "--cache-type-k q8_0 -c 16384"`
- **WHEN** the agent is parsed from AGENTS.md
- **THEN** `agent.llama_flags` equals `"--cache-type-k q8_0 -c 16384"`

#### Scenario: Agent without llama_flags
- **GIVEN** an agent with no `llama_flags` field in frontmatter
- **WHEN** the agent is parsed from AGENTS.md
- **THEN** `agent.llama_flags` equals `null`

### Requirement: X-Agent-Flags header emission
The inference pipeline SHALL emit an `X-Agent-Flags` HTTP header when the agent has `llama_flags` set.

#### Scenario: Header emitted for agent with flags
- **GIVEN** an agent with `llama_flags: "--cache-type-k q8_0"`
- **WHEN** `streamCompletion()` is called with that agent
- **THEN** the `streamText()` call receives `headers: { 'X-Agent-Flags': '--cache-type-k q8_0' }`

#### Scenario: No header when agent has no flags
- **GIVEN** an agent with `llama_flags: null`
- **WHEN** `streamCompletion()` is called with that agent
- **THEN** no `X-Agent-Flags` header is included in the request

#### Scenario: No header when agent is null
- **GIVEN** no agent (raw chat session)
- **WHEN** `streamCompletion()` is called
- **THEN** no `X-Agent-Flags` header is included in the request

#### Scenario: Whitespace-only flags produce no header
- **GIVEN** an agent with `llama_flags: "   "`
- **WHEN** `streamCompletion()` is called with that agent
- **THEN** no `X-Agent-Flags` header is included in the request

### Requirement: Existing sampler fields unchanged
The existing sampler fields (top_k, min_p, etc.) SHALL continue to flow through `providerOptions.openaiCompatible` in the request body, independent of the `X-Agent-Flags` header channel.

#### Scenario: Dual-channel sampling
- **GIVEN** an agent with `top_k: 20` and `llama_flags: "--cache-type-k q8_0"`
- **WHEN** an inference request is made
- **THEN** the request body contains `top_k: 20` via providerOptions
- **AND** the request header contains `X-Agent-Flags: --cache-type-k q8_0`
