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feat(executor): support nested loop execution and canvas nesting#3387

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abram0v1ch wants to merge 15 commits intosimstudioai:stagingfrom
abram0v1ch:feat/loop_nesting
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feat(executor): support nested loop execution and canvas nesting#3387
abram0v1ch wants to merge 15 commits intosimstudioai:stagingfrom
abram0v1ch:feat/loop_nesting

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@abram0v1ch abram0v1ch commented Mar 1, 2026

Summary

Add support for nested loop execution (loop-in-loop) across the executor, terminal display, and canvas.

  • DAG construction: Wire inner loop sentinel nodes into outer loop sentinel chains, resolve boundary nodes via effective sentinel IDs, and handle loop-exit edges from inner sentinel-end to outer sentinel-end
  • Runtime: Introduce ParentIteration type and loopParentMap to track ancestor loop state; extend LoopResolver with named loop references (e.g. <loop1.index>) and output property resolution (<loop1.result>)
  • Terminal: Thread parentIterations through SSE events; recursively nest inner loop subflow rows inside parent iteration rows using depth-stripping
  • Canvas: Allow dropping loop/parallel containers inside other containers; add cycle detection to prevent placing a container inside its own descendant; resize all ancestor containers on child move; surface all ancestor loop tags in the tag dropdown

Note: This currently handles loop-in-loop nesting only. Parallel-in-loop and parallel-in-parallel nesting is not yet supported.

Testing

  • Added 3 new test cases for nested loop DAG edge wiring (edges.test.ts)
  • Added 8 new test cases for named loop variable resolution (loop.test.ts)
  • All tests pass

waleedlatif1 and others added 15 commits February 16, 2026 00:36
…stash, algolia tools; isolated-vm robustness improvements, tables backend (simstudioai#3271)

* feat(tools): advanced fields for youtube, vercel; added cloudflare and dataverse tools (simstudioai#3257)

* refactor(vercel): mark optional fields as advanced mode

Move optional/power-user fields behind the advanced toggle:
- List Deployments: project filter, target, state
- Create Deployment: project ID override, redeploy from, target
- List Projects: search
- Create/Update Project: framework, build/output/install commands
- Env Vars: variable type
- Webhooks: project IDs filter
- Checks: path, details URL
- Team Members: role filter
- All operations: team ID scope

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* style(youtube): mark optional params as advanced mode

Hide pagination, sort order, and filter fields behind the advanced
toggle for a cleaner default UX across all YouTube operations.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* added advanced fields for vercel and youtube, added cloudflare and dataverse block

* addded desc for dataverse

* add more tools

* ack comment

* more

* ops

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

* feat(tables): added tables (simstudioai#2867)

* updates

* required

* trashy table viewer

* updates

* updates

* filtering ui

* updates

* updates

* updates

* one input mode

* format

* fix lints

* improved errors

* updates

* updates

* chages

* doc strings

* breaking down file

* update comments with ai

* updates

* comments

* changes

* revert

* updates

* dedupe

* updates

* updates

* updates

* refactoring

* renames & refactors

* refactoring

* updates

* undo

* update db

* wand

* updates

* fix comments

* fixes

* simplify comments

* u[dates

* renames

* better comments

* validation

* updates

* updates

* updates

* fix sorting

* fix appearnce

* updating prompt to make it user sort

* rm

* updates

* rename

* comments

* clean comments

* simplicifcaiton

* updates

* updates

* refactor

* reduced type confusion

* undo

* rename

* undo changes

* undo

* simplify

* updates

* updates

* revert

* updates

* db updates

* type fix

* fix

* fix error handling

* updates

* docs

* docs

* updates

* rename

* dedupe

* revert

* uncook

* updates

* fix

* fix

* fix

* fix

* prepare merge

* readd migrations

* add back missed code

* migrate enrichment logic to general abstraction

* address bugbot concerns

* adhere to size limits for tables

* remove conflicting migration

* add back migrations

* fix tables auth

* fix permissive auth

* fix lint

* reran migrations

* migrate to use tanstack query for all server state

* update table-selector

* update names

* added tables to permission groups, updated subblock types

---------

Co-authored-by: Vikhyath Mondreti <vikhyath@simstudio.ai>
Co-authored-by: waleed <walif6@gmail.com>

* fix(snapshot): changed insert to upsert when concurrent identical child workflows are running (simstudioai#3259)

* fix(snapshot): changed insert to upsert when concurrent identical child workflows are running

* fixed ci tests failing

* fix(workflows): disallow duplicate workflow names at the same folder level (simstudioai#3260)

* feat(tools): added redis, upstash, algolia, and revenuecat (simstudioai#3261)

* feat(tools): added redis, upstash, algolia, and revenuecat

* ack comment

* feat(models): add gemini-3.1-pro-preview and update gemini-3-pro thinking levels (simstudioai#3263)

* fix(audit-log): lazily resolve actor name/email when missing (simstudioai#3262)

* fix(blocks): move type coercions from tools.config.tool to tools.config.params (simstudioai#3264)

* fix(blocks): move type coercions from tools.config.tool to tools.config.params

Number() coercions in tools.config.tool ran at serialization time before
variable resolution, destroying dynamic references like <block.result.count>
by converting them to NaN/null. Moved all coercions to tools.config.params
which runs at execution time after variables are resolved.

Fixed in 15 blocks: exa, arxiv, sentry, incidentio, wikipedia, ahrefs,
posthog, elasticsearch, dropbox, hunter, lemlist, spotify, youtube, grafana,
parallel. Also added mode: 'advanced' to optional exa fields.

Closes simstudioai#3258

* fix(blocks): address PR review — move remaining param mutations from tool() to params()

- Moved field mappings from tool() to params() in grafana, posthog,
  lemlist, spotify, dropbox (same dynamic reference bug)
- Fixed parallel.ts excerpts/full_content boolean logic
- Fixed parallel.ts search_queries empty case (must set undefined)
- Fixed elasticsearch.ts timeout not included when already ends with 's'
- Restored dropbox.ts tool() switch for proper default fallback

* fix(blocks): restore field renames to tool() for serialization-time validation

Field renames (e.g. personalApiKey→apiKey) must be in tool() because
validateRequiredFieldsBeforeExecution calls selectToolId()→tool() then
checks renamed field names on params. Only type coercions (Number(),
boolean) stay in params() to avoid destroying dynamic variable references.

* improvement(resolver): resovled empty sentinel to not pass through unexecuted valid refs to text inputs (simstudioai#3266)

* fix(blocks): add required constraint for serviceDeskId in JSM block (simstudioai#3268)

* fix(blocks): add required constraint for serviceDeskId in JSM block

* fix(blocks): rename custom field values to request field values in JSM create request

* fix(trigger): add isolated-vm support to trigger.dev container builds (simstudioai#3269)

Scheduled workflow executions running in trigger.dev containers were
failing to spawn isolated-vm workers because the native module wasn't
available in the container. This caused loop condition evaluation to
silently fail and exit after one iteration.

- Add isolated-vm to build.external and additionalPackages in trigger config
- Include isolated-vm-worker.cjs via additionalFiles for child process spawning
- Add fallback path resolution for worker file in trigger.dev environment

* fix(tables): hide tables from sidebar and block registry (simstudioai#3270)

* fix(tables): hide tables from sidebar and block registry

* fix(trigger): add isolated-vm support to trigger.dev container builds (simstudioai#3269)

Scheduled workflow executions running in trigger.dev containers were
failing to spawn isolated-vm workers because the native module wasn't
available in the container. This caused loop condition evaluation to
silently fail and exit after one iteration.

- Add isolated-vm to build.external and additionalPackages in trigger config
- Include isolated-vm-worker.cjs via additionalFiles for child process spawning
- Add fallback path resolution for worker file in trigger.dev environment

* lint

* fix(trigger): update node version to align with main app (simstudioai#3272)

* fix(build): fix corrupted sticky disk cache on blacksmith (simstudioai#3273)

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Lakee Sivaraya <71339072+lakeesiv@users.noreply.github.com>
Co-authored-by: Vikhyath Mondreti <vikhyath@simstudio.ai>
Co-authored-by: Vikhyath Mondreti <vikhyathvikku@gmail.com>
… fixes, removed retired models, hex integration
…ogle tasks and bigquery integrations, workflow lock
Wire inner loop sentinel nodes into outer loop sentinel chains so that
nested loops execute correctly. Resolves boundary-node detection to use
effective sentinel IDs for nested loops, handles loop-exit edges from
inner sentinel-end to outer sentinel-end, and recursively clears
execution state for all nested loop scopes between iterations.

NOTE: loop-in-loop nesting only; parallel nesting is not yet supported.
Made-with: Cursor
…able resolution

Introduce ParentIteration to track ancestor loop state, build a
loopParentMap during DAG construction, and propagate parent iterations
through block execution and child workflow contexts.

Extend LoopResolver to support named loop references (e.g. <loop1.index>)
and add output property resolution (<loop1.result>). Named references
use the block's display name normalized to a tag-safe identifier,
enabling blocks inside nested loops to reference any ancestor loop's
iteration state.

NOTE: loop-in-loop nesting only; parallel nesting is not yet supported.
Made-with: Cursor
… and terminal display

Thread parentIterations through SSE block-started, block-completed, and
block-error events so the terminal can reconstruct nested loop
hierarchies. Update the entry tree builder to recursively nest inner
loop subflow nodes inside their parent iteration rows, using
parentIterations depth-stripping to support arbitrary nesting depth.

Display the block's store name for subflow container rows instead of
the generic "Loop" / "Parallel" label.

Made-with: Cursor
Remove the restriction that prevented subflow nodes from being dragged
into other subflow containers, enabling loop-in-loop nesting on the
canvas. Add cycle detection (isDescendantOf) to prevent a container
from being placed inside one of its own descendants.

Resize all ancestor containers when a nested child moves, collect
descendant blocks when removing from a subflow so boundary edges are
attributed correctly, and surface all ancestor loop tags in the tag
dropdown for blocks inside nested loops.

Made-with: Cursor
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vercel bot commented Mar 1, 2026

@abram0v1ch is attempting to deploy a commit to the Sim Team on Vercel.

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2 participants