LLeMbas CLI 1.5.1

An image counted as half a million tokens: the context estimate measured its
base64 as text, so a 1-3 MB screenshot read as "context at 150-280%" the
moment view_image added it, and the session compacted after every image.
An image now counts by its dimensions (28 px patches, at most 16k tokens, a
flat 1600 when unreadable) everywhere the CLI estimates -- the meter, pruning,
/context and the no-usage fallback of all five dialects. Images over 1600 px
or 500 KB are shrunk to 1600 px when ImageMagick is there.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/session/context.ts

@@ -2,7 +2,7 @@
 // up to what the server last reported when it reported anything.
 import type { Engine } from "./engine.ts"
 import { contextWindow } from "../provider/discover.ts"
-import { estimateTokens } from "../provider/tokens.ts"
+import { estimateTokens, imageTokens } from "../provider/tokens.ts"
 import { toSpec, type Tool } from "../tool/tool.ts"
 
 export interface ContextRow {
@@ -29,7 +29,7 @@ export function contextBreakdown(engine: Engine, system: string, instructions: {
         else if (p.type === "tool_call") by.calls += estimateTokens(p.name + p.args)
         else {
           imageCount++
-          by.images += 800 // providers bill an image at roughly this for a typical screenshot
+          by.images += imageTokens(p.data) // by its dimensions, as contextUsed counts it
         }
       }
   }