feat(claude): support image attachments

ARCHITECTURE.md

@@ -480,11 +480,15 @@ File: [`src/claude.rs`](src/claude.rs)
 | New chat | `claude -p --session-id <uuid>` |
 | Resumed chat | `claude -p --resume <uuid>` |
 | Instructions | `--append-system-prompt <composed system sections>` |
+| Images | base64 content blocks over `--input-format stream-json` stdin |
 | Unattended job | `--permission-mode bypassPermissions` |
 | Evaluator | safe mode, no tools, no MCP, no Chrome, no session persistence |
 
 Push chooses Claude's initial session ID and marks it started before execution
-so a partial create failure is not retried as another create.
+so a partial create failure is not retried as another create. Text-only turns
+keep the single-result JSON command contract. Image turns use one streaming JSON
+user message and parse the final result event without putting image data in
+process arguments.
 
 ### Codex
 

Cargo.toml

@@ -22,6 +22,7 @@ toml = "1"
 toml_edit = "0.23"
 uuid = { version = "1", features = ["v4"] }
 anyhow = "1"
+base64 = "0.22"
 humantime = "2"
 sha2 = "0.10"
 chrono-tz = "0.10"

docs/telegram.md

@@ -52,10 +52,10 @@ Telegram-only preflight does not open `chat.db` and does not require macOS or
 
 ## Image Messages
 
-With Codex or Pi selected for the conversation, send the bot a Telegram photo
-or an image document. Push accepts JPEG, PNG, and WebP files. A caption becomes
-the message text; an image without a caption is still accepted. Telegram media
-groups are processed as separate messages.
+Send the bot a Telegram photo or an image document with Claude Code, Codex, or
+Pi selected for the conversation. Push accepts JPEG, PNG, and WebP files. A
+caption becomes the message text; an image without a caption is still accepted.
+Telegram media groups are processed as separate messages.
 
 Push downloads an image only after the private-chat and sender allowlist checks
 pass. The declared and downloaded size must fit within the 6 MiB per-message
@@ -67,13 +67,12 @@ Validated bytes are written to an owner-only temporary directory under
 `$PUSH_HOME/cache`, attached to the agent turn, and removed after success,
 failure, timeout, interruption, or session recovery. Push stores the caption or
 an `[Image attachment]` placeholder in conversation history, not the image
-bytes. The image is sent through the configured Codex or Pi model provider, so
-review that provider's image and data controls before using this feature. Pi
-receives images using its native `@image-path` arguments while message text
-continues through standard input.
+bytes. The image is sent through the configured model provider, so review that
+provider's image and data controls before using this feature. Claude Code
+receives base64 content blocks through streaming JSON input. Pi receives native
+`@image-path` arguments while message text continues through standard input.
 
-Image input for Claude Code, and sending generated images back through Telegram,
-are not supported yet.
+Sending generated images back through Telegram is not supported yet.
 
 ## Voice Messages
 

src/agent.rs

@@ -124,17 +124,6 @@ impl Runner {
         matches!(self, Runner::Claude(_))
     }
 
-    pub fn supports_images(&self) -> bool {
-        if matches!(self, Runner::Codex(_) | Runner::Pi(_)) {
-            return true;
-        }
-        #[cfg(test)]
-        if let Self::Fake(runner) = self {
-            return matches!(runner.backend, AgentBackend::Codex | AgentBackend::Pi);
-        }
-        false
-    }
-
     pub async fn run(&self, req: Request<'_>, timeout: Duration) -> Result<RunOutput, RunError> {
         match self {
             Runner::Claude(r) => r.run(req, timeout).await,