Release v1.5.0 — Agentic Workflow Designer + cross-model compatibility#19
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Three model-family bugs were live before this:
• Qwen/Llama/gpt-oss 400 with "unknown field stream_options".
Mason added stream_options.include_usage on every streaming
request to surface Anthropic cache stats, but those providers
reject the field.
• Gemini 400 with "Gemini models only support one system prompt".
Mason builds up to three system messages (skills manifest +
user prompt + tool-aware nudge); Gemini permits exactly one.
Other models tolerated multiple so we never noticed.
• Llama / Qwen 3 next 400 with "max_tokens cannot exceed N".
The 16384 cap was for Opus extended thinking; Llama caps at
8192 and Qwen 3 next at 10000.
Fixes:
• src/chat-shared.ts (new): extracted flattenContent,
applyAnthropicCaching, plus three new helpers — supportsStreamOptions
(allowlist Claude / GPT / Codex / o-series; explicitly exclude
gpt-oss), maxTokensFor (16384 for Claude, 10000 for Qwen 3 next,
8192 default), consolidateSystemMessages (collapse multiple
role:"system" into one with \n\n separator; universally
compatible and preserves cache_control behavior).
• src/main.ts: import from chat-shared, gate body.stream_options
on supportsStreamOptions, run consolidateSystemMessages before
applyAnthropicCaching, and use maxTokensFor for both chat-
completions branches.
Regression coverage:
• scripts/test-models.js (new): standalone Node sweep that mints
OAuth via the local databricks CLI, discovers every chat model
via /api/2.0/serving-endpoints, and runs three scenarios
(hello-no-tools, hello-with-tools, multi-system) against each.
Mirrors Mason's chat-handler logic by reusing the same helpers
from build/ts/chat-shared.js. Mirrors the chatLoop "promote to
responses when tools + responses-supported" rule so gpt-5-5
tool tests are skipped (Mason never sends them via chat
completions).
• npm run test:models — runs the sweep. --filter <substr> scopes
to a model subset; --profile <name> picks a non-DEFAULT
databrickscfg profile.
End-to-end result: 81/81 model+scenario combinations green on the
user's workspace (Claude, GPT, GPT-OSS, Gemini, Llama 3/4, Qwen 3
next + 3.5, Gemma).
Co-authored-by: Isaac
Co-authored-by: Isaac
Qwen 3.5 122B, Gemini 2.5, and gpt-oss stream delta.content as an array of content parts; appending it to a string yielded literal "[object Object]" in the chat window. Coerce through flattenContent before accumulating/emitting. Sweep now parses SSE deltas the same way and fails on "[object Object]" in assembled output. Co-authored-by: Isaac
…r.ts resolveModelRouting (gateway/format resolution incl. tools->Responses promotion), executeToolCore (headless load_skill/builtin/MCP dispatch), and capToolResult move to src/agent-runner.ts so the upcoming workflow engine can reuse them. getAllToolDefs gains an optional allowlist param (narrowing only) for per-cell tool selection; renderQuestionCard gains an optional container. Chat behavior unchanged. Co-authored-by: Isaac
Visual node-based workflow designer (sidebar button above Profile, Cmd+D). Cells select a model + per-cell tool subset + prompt; flow edges pipe outputs downstream with labeled multi-input joins; dashed feedback edges create bounded revision loops driven by a forced route_output verdict tool on gate cells. Sequential execution through the existing chat IPC; budgets (40 inner / 5 feedback / 25 global) guard against runaway loops. Workflows persist to ~/.mason/workflows. Includes the Spec → Implement → Test → Review template. Co-authored-by: Isaac
…e pressure Loops were already bounded (5 revisions per cell, 25 cell runs global, gatekeeper forces a terminal route on exhaustion) but invisibly so. Now: feedback-target cells show an editable revision cap (1-20) on the card; status pills show loop progress (running 3/5); gates see 'revision N of M' annotations on revised inputs plus per-route budget state and an explicit don't-chase-perfection instruction. Verified against a critic prompted to never be satisfied: forced to route end after the cap, 4 cell runs. Co-authored-by: Isaac
Co-authored-by: Isaac
feat(designer): Agentic Workflow Designer
Co-authored-by: Isaac
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Lands everything for the v1.5.0 release onto
main. PR #17 (cross-model compat) was closed unmerged and PR #18 (designer) merged into this branch instead ofmain, so this single PR carries both onto the default branch.Contents
Agentic Workflow Designer (was #18)
route_outputverdict; bounded feedback loops (editable per-cell revision cap, 25-run global budget)~/.mason/workflows/docs/designer.pngCross-model compatibility (was #17)
stream_optionsper family (fixes Qwen 3.5 / Llama 4400 unknown field)max_tokenscapsdelta.content(fixes[object Object]on Qwen 3.5 / Gemini / gpt-oss)npm run test:modelscross-model sweep (81 scenarios)Release
chore(release): 1.5.0— package.json + manifest + lockfileAfter merge
v1.5.0release tag fromfeat/workflow-designerto themainmerge commit, then publish.