feat(#3996): fall back to an explicit user-prompt filename for one unnamed image - #4027
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aheritier wants to merge 2 commits into
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feat(#3996): fall back to an explicit user-prompt filename for one unnamed image#4027aheritier wants to merge 2 commits into
aheritier wants to merge 2 commits into
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Explicitly image-output-capable Gemini gateway requests now carry a system instruction asking the model to emit one exact "[media-file: relative/path]" line per generated image, echoing an explicitly requested name or choosing a meaningful kebab-case one, and to produce a single image unless variations are requested. handleStream filters those marker lines out of both the live event stream and the persisted assistant text with a chunk-split-safe, strictly bounded line parser, then pairs the extracted paths positionally onto the accumulated media blobs via MediaDelta.RequestedPath. Naming precedence stays marker -> provider display name -> generated-N, and marker paths remain untrusted input: they flow through the existing workspacemedia classification, MIME extension correction, escape elicitation/redirect, and never-overwrite writer unchanged. Extra blobs still materialize under their fallback names; extra markers are stripped but ignored.
…named image A live image-output model can ignore the [media-file:] marker instruction entirely, leaving a prompt like "Generate an image as sunshine.jpg" to land as generated-1.png. Add a deterministic fallback: when a turn returns exactly ONE media blob that marker pairing left unnamed, parse a single unambiguous explicit output filename from the triggering user message. The cue grammar is strict, deliberately not NLP: save (it) as / save to / write to / output to / name it / call it / filename:=, plus bare "as" only inside a narrow imperative output context (generation verb + optionally-articled media noun, e.g. "Generate an image as sunshine.jpg"), and a companion of-phrase form (generation verb + media noun + "of <subject>" + "as <filename>") so "Generate an image of a red panda as assets/red-panda.jpg" extracts the intended name. The of-phrase subject cannot cross quotes, clause punctuation, or CR/LF, and any subject containing "as", "with", or "in" is refused because those prepositions introduce open-ended attribute phrases whose trailing "as" compares — a false reject only costs the generic generated-N name, while a false capture could engage the escape-confirmation policy for a merely referenced file. Bare "called" and unanchored "as" are NOT cues, so comparative references to existing files never extract a name. Candidates are keyed by the filename capture's position: one occurrence matched by both grammars counts once; distinct occurrences stay ambiguous and extract nothing. Names may be quoted, backticked, or unquoted with a known image extension; zero or multiple candidates extract nothing. Precedence stays marker -> user-prompt filename -> provider display name -> generic generated-N, and the extracted path only fills MediaDelta.RequestedPath, so the existing untrusted-path pipeline (MIME/extension correction, collision suffixing, workspace containment and escape confirmation) applies unchanged.
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What
Uses an explicit filename from the user prompt when exactly one generated image has no filename, with marker parsing and streaming coverage.
Why
Produces predictable, user-friendly names without guessing when the prompt supplies a clear name.
Validation
task test; filename extraction, marker, Gemini instruction, and streaming tests.Test instructions
Run:
task testRequest exactly one unnamed generated image with an explicit filename in the user prompt. Expected: that filename is used. Repeat with an ambiguous prompt or multiple images; expected: the safe fallback naming behavior is retained.