**jms:** *(ran /clear)* ok lets take a look at 330.0020 TDPyMovieplayer. this is a mostly empty touchdesigner project that was generated by 330.0010. 330.0020 TDPyMovieplayer is intended as a test project for working on TD files in python. orient yourself to the project and give me a project outline for developing the following. A TD TOE that contains a moviefile player that loads a folder of video files, gets the length of each video, plays them in a random order, starting in a random spot, and at a random speed, and jumps to the next video after a fixed duration of time (later we will convert this to midi control). **Claude:** I'll orient myself to the project first. I've read the project, the framework it came from, and the phase plan on 160.0010. Here's where things stand and what I'd build. ## Orientation [0020 - TDPyMovieplayer/](300-Code/330 - TouchDesigner/0020 - TDPyMovieplayer/) holds `testTDPyProject/` — a generator-fresh repo at commit `e90f8b3`, still carrying the Phase 0 placeholder network (noise → level → null) plus one uncommitted character change (`period` 0.175 → 1.175). The startup log shows the loop working end to end: build at launch, four successful rebuilds via `reload()`. So the scaffolding is proven and completely empty of content. Two things to note before design: - The inner repo is still named `testTDPyProject` — `.toe`, README, launcher and all. Regenerating with `new-project.bat TDPyMovieplayer` is cheaper than renaming by hand, and there's nothing here worth keeping. - 160.0010's Phase 3 says the build layer waits "for a real project to say which helpers it needs." **This is that project.** The outline below is as much a spec for Phase 3 as for the player. ## The one genuinely hard problem Everything in your description is easy except *"gets the length of each video."* A Movie File In TOP doesn't know a file's duration until it has loaded and parsed the header, which happens over some number of frames after you set the `file` parameter. There is no synchronous `get_duration(path)`. A naive Python loop over the playlist returns zeros or stale values for every file. That forces the project's central architectural choice, and it's worth deciding before writing anything: **A. Probe inside TouchDesigner.** A dedicated Movie File In TOP walks the playlist, one file every N frames, reading duration off an Info CHOP and writing it into a table. No dependencies, but it's an asynchronous state machine — the framework has never expressed one, so this is real work and the interesting kind. **B. Probe outside.** `ffprobe` (or a Python lib) reads durations at build time, synchronously, in about ten lines. Fast and testable on a normal machine, but adds an external binary the framework has so far avoided entirely. **My recommendation: A, with a JSON cache.** Probe in TD once, cache `{path, size, mtime → duration, fps}` to a gitignored sidecar, and skip the probe on every later launch when the cache is warm. You get the dependency-free version, the startup cost is paid once, and the async-probe machinery is exactly the kind of thing the framework needs to learn to build in code. One thing to check first, because it could shrink the problem: verify whether the Movie File In TOP's **Cue Point Unit** offers a fractional/normalized option in 2025.32050. If it does, "start at a random spot" needs no duration at all — you'd still want lengths for the speed/dwell math below, but the critical path gets much shorter. ## Architecture **The advance trigger is a plain Python function.** This is the decision that makes the MIDI conversion trivial later: ```python player.advance() # pick next clip, cue it, start it ``` The dwell timer's callback is a two-line shim that calls it. A MIDI note callback will be a different two-line shim calling the same function. Nothing else needs to change — the same pattern `controls.py` already uses, where the Panel Execute DAT's text is written from disk and holds no logic. **Timing** via a Timer CHOP with a callbacks DAT, not a frame counter. It gives a real cycle callback, and the dwell length becomes a parameter rather than arithmetic. **Playback** starts as one Movie File In TOP and moves to A/B later — switching `file` on a single TOP gives you a black frame or a hitch at every cut. Two TOPs, preload the next during the current clip's dwell, cross with a Switch TOP. Don't build this until you've seen the single-player hitch and decided it matters. **Speed, start point and dwell interact.** With speed `s` and dwell `T`, a clip consumes `s·T` seconds of media. Either constrain the random start to `[0, duration − s·T]` so a clip never runs out early, or let it run off the end and accept it. Worth an explicit toggle rather than an accident — this is the main thing durations buy you beyond the random start. **State lives in the network, not in module globals.** A playlist Table DAT, plus custom parameters for seed, dwell, and speed range. Note the tension with clear-and-rebuild: `build()` destroys its own container, so anything that must survive a rebuild sits beside it at `/project1`, the way the rebuild button already does. Seeding the RNG makes a sequence reproducible, which matters a lot when debugging something this stochastic. **Media path is machine-local** — the videos don't go in the repo. A gitignored config file or env var with a sane fallback, decided in Phase 1. ## Phases **Phase 1 — playlist.** Regenerate as `TDPyMovieplayer`. Scan a configured folder for video extensions, write a Table DAT playlist with path/name/size. No playback yet. Pure Python, unit-testable outside TouchDesigner. Settles the media-path config question. **Phase 2 — one clip, playing.** A single Movie File In TOP plus a null out. Load one file, play it, get it on screen. Establishes the parameter names — `file`, `play`, `cue`, `cuepoint`, `speed`, and their real internal spellings, which are regularly not what the UI labels say (`mono`, not `monochrome`). Record them; guessing costs a warning per the `set_par` design, but the point is to stop guessing. **Phase 3 — durations.** The async prober and its cache, per the decision above. This is the phase that can go long, and the only one that can. Ends with every playlist row carrying a duration and an fps. **Phase 4 — the cycle.** Timer CHOP, callbacks DAT, `advance()`. Random order (shuffled-deck, not independent draws, so you don't get immediate repeats), random start, random speed. Fixed dwell. The player is done at the end of this phase. **Phase 5 — controls.** A panel beside the build container: dwell, speed range, seed, a skip button, a reload-playlist button. Note the known open issue — `activeViewer` doesn't stick when set from code, so the first click of a session lands on an inert panel until the flag is switched by hand. This phase is where that either gets fixed (the untested `delayFrames=1` hypothesis) or gets loud. **Phase 6 — seamless cuts.** A/B players and preloading, if Phase 4 showed a visible hitch. **Phase 7 — MIDI.** A MIDI In callback shim calling `advance()`, and mapping CCs onto the parameters from Phase 5. Small by construction if the earlier phases hold the line. Phases 1–4 are the actual project. 5–7 are extensions, and 6 is conditional. ## What I'd like decided before I start 1. **Duration strategy** — in-TD prober with cache (my recommendation), or ffprobe? 2. **Regenerate as `TDPyMovieplayer`,** discarding `testTDPyProject`? Nothing is lost but the one-character `period` edit. 3. **Where the videos live** — do you have a folder in mind, or should Phase 1 invent a config convention? 4. **Where this outline gets recorded.** 160.0010's plan lives on its catalog page, but 330.0020 deliberately has no catalog page yet, pending the `160` vs `110`/`140` question. I can park the plan in the Working Notes of [0020 - TDPyMovieplayer.md](300-Code/330 - TouchDesigner/0020 - TDPyMovieplayer.md) for now and move it when the catalog page exists — or you can settle the catalog page's home and I'll write it there properly. **jms:** 1. Prober in TD if it works 2. i deleted the folder. regenerate as TDPyMovieplayer 3. in a folder in the repo, contents in gitignore. 4. create the page in 160. 5. i have created a blank repo at https://github.com/wtkns/TDPyMovieplayer.git set this as the remote for the repository **Claude:** Both siblings are repo roots, so I'll flatten: `0020 - TDPyMovieplayer/` will *be* the repo (last time it was nested only because the generated name didn't match). Generating with the clean name, then renaming the folder to carry the vault number — that keeps `TDPyMovieplayer.toe` and `TDPyMovieplayer_vEnv` free of numbering artifacts. Now the remote and the commit. Nothing was written. Falling back to the Write tool for this one. Now the index entries and the code-side page. All five points are done. **Repository** — [0020 - TDPyMovieplayer/](300-Code/330 - TouchDesigner/0020 - TDPyMovieplayer/) regenerated with `new-project.bat TDPyMovieplayer`, remote set to `https://github.com/wtkns/TDPyMovieplayer.git`, and both commits pushed to `main`: - `d78201a` — generated project - `8df4df8` — `media/` folder and a README opening that describes the player rather than the framework Two judgment calls worth flagging: - **Flattened the nesting.** The numbered folder *is* the repo now, matching `330.0010` and `330.0060`. Last time's `testTDPyProject/` sublevel existed only because the generated name didn't match the folder. - **Generated as `TDPyMovieplayer`, then renamed the folder** to carry the vault number, rather than passing `0020 - TDPyMovieplayer` as the project name. The generator derives the `.toe` filename, the vEnv name and the README title from the name given, so the numbered form would have leaked vault numbering into a repo published as `TDPyMovieplayer` — which is what happened to `330.0010`, whose committed `0010 - TouchDesigner-Python_vEnv/` still carries it. I recorded this as a folder-wide convention in [00010 - TouchDesigner Notes.md](300-Code/330 - TouchDesigner/00010 - TouchDesigner Notes.md). `media/` uses the same tracked-but-empty pattern as the vEnv folders — its own `.gitignore` with `*` and `!.gitignore` — so the folder survives a clone while nothing in it is ever committed. Documented in the root `.gitignore` and the README. **Vault pages** — [0020 - TDPyMovieplayer.md](100-Projects/160 - Software/0020 - TDPyMovieplayer.md) created in `160 - Software` with the full seven-phase plan, and [330.0020](300-Code/330 - TouchDesigner/0020 - TDPyMovieplayer.md) rewritten with the real repository, setup and layout notes. Both indexes updated. No new tags needed — `#video` and `#live-visuals` were already registered. One thing I want to name before Phase 1: the plan commits to the in-TD prober, but Phase 2 should check whether **Cue Point Unit** offers a fractional option in 2025.32050. If it does, the random-start requirement needs no durations at all, and Phase 3 — the one phase whose length is genuinely unknown — comes off the critical path for everything except the speed/dwell overrun math. Cheap to check, and it's the only thing that could meaningfully reshape the schedule. The vault changes aren't committed — say "update and push" when you want the session wrapped up. **jms:** update and push **Claude:** Now the session log entry. Now Site Notes' Current Work. Now the transcript. Updated and pushed. **Code repo** — `TDPyMovieplayer` was already committed and pushed earlier in the session (`8df4df8` on `main`), and is clean, so nothing new there. **Vault** — commit `3763eee`, pushed to `main`: - Session log entry `2026-09-07 (6)` — the async-duration finding and why the in-TD prober was chosen over `ffprobe`, the `advance()`-as-function decision, the flatten and generate-then-rename choices, and the phase ordering rationale. - Transcript at [2026-09-07 - tdpymovieplayer-plan.md](300-Code/390 - Claude Code/9990 - wtkns.com/transcripts/2026-09-07 - tdpymovieplayer-plan.md). - [010 - Site Notes.md](010 - Site Notes.md) Current Work: the TDPyMovieplayer item rewritten from "generate a project and try adding code" to the real project state with next step. Also refreshed the TouchDesigner-Python line, which still said Phases 0–1 at `528f59c` — Phase 2 landed at `eeaf596` last session. - Memory: appended the generate-plain-then-rename convention and the numbered-folder-is-the-repo-root rule to `vault-numbering-scheme`, with the MEMORY.md hook updated. Two things left alone deliberately: `wtkns.com.code-workspace` is untracked and predates this session, so I didn't commit it — tell me if it should be tracked or ignored. And `TDPyMovieplayer_vEnv` doesn't exist yet; tdPyEnvManager needs to create it under exactly that name before `open-project.bat` will give you a working interpreter in VS Code. **jms:** i generated the venv file but the automatically generated name doesnt match, its prepended with the catalog number **Claude:** Found the cause, and it corrects something I wrote last turn. tdPyEnvManager derives the environment name from the **containing folder**, not from the project name — so it produced `0020 - TDPyMovieplayer_vEnv`. The generate-plain-then-rename step I recorded in [00010 - TouchDesigner Notes.md](300-Code/330 - TouchDesigner/00010 - TouchDesigner Notes.md) doesn't prevent this leak, because the manager runs against the vault-numbered folder regardless of what the project was generated as. The env name has to be fixed as its own step, and that note needs amending. A rename is safe here. `pyvenv.cfg` points `home` and `executable` at TouchDesigner's `bin`, not at the venv folder, so nothing inside depends on its own name except the `activate` scripts' baked path and `prompt` — and neither VS Code (which uses `Scripts/python.exe` directly) nor TD's side-loading (which just adds `Lib/site-packages`) goes through those. Separately: `TDPyMovieplayer.toe` is modified and uncommitted, grown from 21,874 to 22,970 bytes. If that's the tdPyEnvManager COMP now living inside the binary, it's a real question for the framework — every generated project would need the same manual step unless `template.toe` carries it. **jms:** The user answered: "How should the virtual environment name be fixed?"="Rename in place (Recommended)", "What changed in TDPyMovieplayer.toe? It's uncommitted and 1.1KB larger."="the tdpyenvmanager base already exists in the template toe. I opened the new TOE and pulsed "Create vEnv". it did not give an option to override the name of the vEnv folder. i am not confident that a rename is safe here. we can move forward but i want this risk noted to avoid chasing incorrect assumptions. It is acceptable to me that the vEnv must be manually linked on the first time activating the TOE, but can the Pulse for tdPyEnvManager > Create vEnv be scripted?". Read the answers carefully — they may request clarification, changes, or that you not proceed — and follow what they actually say. **Claude:** Noted, and I'll record the rename risk rather than treat it as proven. Before renaming, let me check whether the manager exposes the env name as a parameter — if it does, setting it and re-pulsing beats a rename outright, and answers your scripting question at the same time. The manager exposes no name override in the UI, but Derivative ships a standalone CLI that does — and it answers your scripting question better than pulsing the parameter would. `TDPyEnvManagerHelper.py` in `bin/Lib/tdutils/` runs as a script with no TouchDesigner process at all, and `Samples/TDPyEnvManager/createEnvStandaloneTest.bat` is Derivative's own example of driving it. It takes `--envName` explicitly: ``` cd "<repo root>" "…/TouchDesigner/bin/python.exe" "…/bin/Lib/tdutils/TDPyEnvManagerHelper.py" \ --mode "Python vEnv" --installPath "<repo root>" --envName "TDPyMovieplayer" --pythonVersion 3.11 ``` Three things I checked in the source rather than assumed: - `appendVEnvSuffix()` adds `_vEnv` only if absent, so `--envName TDPyMovieplayer` yields exactly `TDPyMovieplayer_vEnv`. The folder-derived name you got is the COMP passing its parent folder's name into this same path. - `--clean` is **never read in `Python vEnv` mode** — `cleanDirectory()` is called only in the Conda branch. Worth knowing, because in the sample `.bat` it sits right next to `--installPath`, and if it did apply it would target the repo root. - `createGitIgnore()` writes exactly the `*` / `!.gitignore` pair we've been treating as a vault convention. It's Derivative's, and we inherited it. This makes the rename unnecessary, which matters given you're not confident it's safe — recreating from the CLI sidesteps that judgment entirely instead of banking on it. The existing folder won't block it either: `verifyPython()` tests for `installPath/python.exe`, and the repo root has none. **jms:** The user answered: "Given the CLI finding, how should the environment be fixed?"="can you update the 330.0010 to use this new information, then recreate 330.0020 from scratch with the updated 330.0010", "Should env creation be wired into the framework now, or left manual for this project?"="Ship create-venv.bat in generated projects (Recommended)", "TDPyMovieplayer.toe is modified and uncommitted after the Create vEnv pulse. Keep or revert?"="reset the repo to empty, delete the folder, and recreate the 0020 project with the new bat. then commit the new version.". Read the answers carefully — they may request clarification, changes, or that you not proceed — and follow what they actually say. **Claude:** Starting with the framework. Let me read the generator and tests in full. Now wire it into the generator. The Bash heredoc is collapsing my backslash escapes — that also explains the earlier failure. Working around it with `chr(92)`. Clean diff. Now the README generator text and the framework README. Now tests. The test was too blunt — the `.bat` explains `--clean` in a comment. Tightening it to the invocation line. 19 tests pass. Committing the framework. Before deleting — checking whether anything irreplaceable is in there. Nothing irreplaceable — `media/` holds only its `.gitignore`. Proceeding with the rebuild. My own shell was sitting inside that folder. Moving out and retrying. The generated script carries the right name. The CLI's closing hint is now stale though — fixing that in the framework. Now restoring the project-specific `media/` folder and README, then building the environment with the new script. Now building the environment with the new script. The helper prompts `Clean install? [Y/N]` unless `--clean` is passed — so my "deliberately absent" reasoning was incomplete. Derivative's sample passes `--clean` for exactly this reason. But `--clean` means "empty the install path", which here is the repo root; it's only read in the Conda branch today, and I'd rather not bet the project on that staying true. Answering the prompt is the safer way out. The backslash collapsing bit again. Fixing that line with `chr(92)`. Now the environment, with the corrected script. The remote still holds the two commits from the old repo, and the new history is unrelated — this force-push discards them, which is the "reset the repo to empty" you asked for. Both repos are done. Now correcting the vault docs — the note I wrote earlier is now factually wrong. Now 330.0020 and 160.0010. Now the session log, memory, and transcript. Now the transcript and the vault commit. All three repos are pushed. **Framework** (`touchdesigner-python`) — three commits ending at `55e7852`. Generated projects now ship `create-venv.bat`, which calls Derivative's standalone `TDPyEnvManagerHelper.py` with `--envName` passed explicitly. 19 tests pass. **TDPyMovieplayer** — regenerated from the updated framework, `cbb2641` and `1fc83cb`, remote force-reset over the discarded history. `TDPyMovieplayer_vEnv` is built and verified: Python 3.11.10 from TouchDesigner's own build, `.vscode/settings.json` pointing at it, and the context file recording the right `envName`. **Vault** — `8224cc4`, with the session log entry, transcript, and corrections. Your instinct on the rename was right, and for a better reason than either of us had at the time: the rename would have worked but it was the wrong layer. The env name wasn't a mistake to repair, it was the component inferring something it had no business inferring, and that would have recurred on every project. Two things I got wrong along the way, both now corrected in the record: - **The convention I wrote earlier today was false.** "Generate plain, rename after" does not keep the vault number out of a project, because tdPyEnvManager reads the folder, not the project name. Fixed in [00010 - TouchDesigner Notes.md](300-Code/330 - TouchDesigner/00010 - TouchDesigner Notes.md) and in memory. - **The first `create-venv.bat` omitted `--clean` on incomplete reasoning.** True that it's only read in the Conda branch; false that omitting it was free — the helper then blocks on `input()` and dies on EOF. That's why Derivative's sample passes it. The script now answers `N` on stdin, which silences the prompt without putting a flag meaning *empty the install path* next to a path that is the repository root. Two things to know before you next open the project: - **TouchDesigner is still running** with the deleted `.toe` open (PID 19188). Close it before launching the new one. - **The environment needs linking by hand on first launch.** The script's context file records `"active": false` where the component's pulse records `true` — the tradeoff you already accepted, noted on both project pages. `wtkns.com.code-workspace` is still untracked; it predates this session and I've left it alone. **jms:** just to note, from my looking online, createEnvStandaloneTest.bat is from an old 2019 configuration example. the TDPyEnvManager component https://derivative.ca/community-post/introducing-touchdesigner-python-environment-manager-tdpyenvmanager/72024 is from 2025. are you sure it is a good idea to go back to such an old configuration method? **Claude:** Worth checking rather than assuming — let me look at what the files themselves say. Good challenge — I checked, and the dating doesn't hold up, but it did surface a real error of mine further down. **The sample ships with the 2025 component, not from 2019.** On disk: - `createEnvStandaloneTest.bat` — dated **Dec 4 2025**, the same date as `tdPyEnvManager.tox` itself - `TDPyEnvManagerHelper.py` — Dec 10 2025 - All three stamped `Exported from TDPyEnvManager version 1.3.1` The `.bat` is generated *by* the component and version-locked to it. **More decisive: the CLI is Derivative's documented automation path for that 2025 component.** From the palette component's own doc page — the one your link describes: > Users that wish to automate the creation of environments can use the TDPyEnvManagerHelper as a CLI. More details at TDPyEnvManagerHelper. And `TDPyEnvManagerHelper.htm` has a full section, "Using the TDPyEnvManagerHelper as a CLI", with per-argument documentation and worked examples. **And the helper isn't an alternative to the component — it's the component's engine.** Per the same docs: *"It gets imported as a module in TouchDesigner in the context of the TDPyEnvManager to be used as a helper class within the TDPyEnvManager"*, and *"It's exposed as the Helper attribute of the TDPyEnvManager, or on `app.pyEnvHelper`."* The pulse and `create-venv.bat` run the same code. The only difference is who supplies `envName` — the component infers it from the folder, the CLI takes it as an argument. So we didn't go backwards to an older method. We're using the current component through the front door Derivative documents for exactly this. **Where your instinct did land on something real** — and it's a correction to what I told you: I said the environment "has to be linked by hand on first launch" because the CLI writes `"active": false`. Reading further, that was an assumption I stated as fact. `active` is read into `self.startAsActive`, and `startAsActive` **is never consulted anywhere in the helper**. Meanwhile `postInit()` calls `linkEnv()` unconditionally whenever it finds a context file. So the environment may well link fine on its own, with `active` only driving the component's UI toggle — which lives in the `.tox` I can't read. Either way the difference is real: `active` is written as `self.Ready`, which is still False when the CLI writes the file. It's the one place the CLI path produces a less complete result than the pulse. That's settled by launching the project once and checking whether `TDPyMovieplayer_vEnv\Lib\site-packages` is on `sys.path` — a one-line textport check. Want me to add it to the startup log so it reports the answer itself, or would you rather just look when you next open it? One aside that's relevant to how much weight to put on the docs versus the source: the doc page says `--mode` takes `Py vEnv`, but argparse's actual `choices` are `Conda Env` and `Python vEnv`. The doc is wrong there; the script uses the value the code accepts. **jms:** thank you for double checking i feel more confident now. can you add it to the startup log and add a test for it to the testing harness? **Claude:** Both belong in the framework, since `tdpy/startup.py` is what every project inherits. Writing the check first. Now propagating to TDPyMovieplayer — `tdpy/startup.py` is a verbatim copy, so I'll copy it and verify it matches what the generator would emit. The `.gitignore` copy overwrote the project's media section — restoring it. Verifying the matcher against the real environment rather than only synthetic paths. Both cases behave correctly against the real environment, not just synthetic paths. **Framework** (`2910978`, pushed) — `tdpy/startup.py` gained `environment_report()`, called from `main()` so it lands in `logs/startup.log` right after the startup line. It scans `sys.path` for a `*_vEnv` site-packages directory and reports one of three things: which environment is linked, that one exists but isn't on the path, or that none was found at all. **Tests** — new `tests/test_startup.py`, six cases, 25 passing overall. They run outside TouchDesigner like the rest, which the module's stdlib-only constraint is what makes possible: - missing environment - environment present but not linked — the case this exists for - linked environment - the macOS `lib/python3.11/site-packages` layout, not just Windows `Lib/` - unnormalised path spellings (`sys.path` holds whatever string was inserted — different case, forward slashes) - an empty `*_vEnv` folder, which must *not* read as linked **TDPyMovieplayer** (`37281cc`, pushed) — took the updated `startup.py`, copied verbatim and verified byte-for-byte against a freshly generated throwaway project, so it stays a copy rather than a fork. One thing that caught me: `.gitignore` is in the generator's verbatim manifest, so copying the framework files over wiped the project's `media/` section. I restored it, and git confirms it's byte-identical to what was committed. Worth knowing for next time you sync a project against the framework — the customised files there are `.gitignore` and `README.md`. The open question from last turn now answers itself on your next launch. If `logs/startup.log` says `environment linked: TDPyMovieplayer_vEnv`, then `active: false` never mattered and the manual-linking caveat I gave you was wrong — I'll correct 330.0010 and 330.0020 accordingly. **jms:** ok i ran open-project.bat. what do you want me to check in the toe file? **Claude:** Nothing — the log already has it. Let me read it. The log answers it, and not the way my second guess predicted. The context file now reads `"active": true`. The CLI wrote `false`; something during that launch rewrote it. So the picture is different from either of my earlier claims, and I should be straight about that: my original "must be linked by hand" caveat matched this launch's log, and my later walk-back — that `startAsActive` is never read, so it probably links anyway — was wrong to state as confidently as I did. The log settles the first launch. It doesn't yet settle *why*. Two readings fit what we see, and they differ in what to do about it: 1. **`active` is the gate.** The launch began with `active: false`, so nothing was linked; the component then activated during startup and wrote `true` back. If so, the next launch links automatically, and `create-venv.bat` should write `active: true` itself so no launch ever starts cold. 2. **My check runs too early.** Derivative's docs say linking happens "before any TouchDesigner COMP cooks", but our report fires at `onStart` + 1 frame — the same deferral the build uses. If the component actually links later, the check is racing it and would report a false negative even on a properly linked project. One relaunch separates them. Close TouchDesigner and run `open-project.bat` again — the context file is already `true`, so this is exactly the "second launch" case: - log says `environment linked: TDPyMovieplayer_vEnv` → reading 1. I'll make `create-venv.bat` write `active: true`, and the manual step disappears for every future project. - log still says `NOT on sys.path` → reading 2, and my check is the thing that's broken, not the environment. I'd then defer it further or re-check on demand rather than once at frame 1. Either result is useful, and one of them means I have a bug to fix. I'll read the log myself after you relaunch — no need to look at anything in the `.toe`. **jms:** <ide_opened_file>The user opened the file c:\Users\jms\Documents\wtkns.com\300-Code\330 - TouchDesigner\0020 - TDPyMovieplayer\logs\startup.log in the IDE. This may or may not be related to the current task.</ide_opened_file> ok i closed the td file without saving and reran open-project.bat. now the active is true, but the status is "could not find a valid vEnv" **Claude:** Second launch: `environment linked: TDPyMovieplayer_vEnv`. So `active` is the gate, and my check isn't racing — reading 1. The component's status disagreeing with that is worth explaining, since that message isn't in the helper source. The `.tox` is fully compressed — no readable strings, so I can't read the component's logic. Checking its documented parameters instead. Derivative's own parameter docs explain the mismatch. On the **Mode** parameter: > Python vEnv are plug n play and are create relative to the .toe file **with a name matching the parent folder**. And on **Active**: *"Toggling active off avoid **detection of a matching vEnv**..."* So the component **discovers** a vEnv by parent-folder name, not just names one that way. It's looking for `0020 - TDPyMovieplayer_vEnv`, finding nothing, and reporting "could not find a valid vEnv". Meanwhile the *context file* path is separate — `postInit` reads `envName` from the JSON and links it, which is why our check sees site-packages on `sys.path`. The same folder-name inference that caused the original problem, surfacing a second time in the UI. Let me prove the environment genuinely works rather than trusting a path string. Installed `cowsay` into the venv — a tiny pure-Python package TouchDesigner doesn't ship. TouchDesigner is running with the environment linked, so one line in the textport settles whether the component's warning means anything: ```python import cowsay; print(cowsay.__file__) ``` - **Prints a path inside `TDPyMovieplayer_vEnv`** → the environment is fully working and the component's status is just its folder-name discovery failing to recognise an environment it didn't name. Cosmetic, and I'll document it as such. - **`ImportError`** → `sys.path` contains the right string but the environment isn't usable, and my check is reporting a false positive. That would be my bug, and a more serious one than the status message. Two things already settled by your relaunch, independent of that result: **`active` is the gate.** First launch (`active: false`) → not linked; second launch (`active: true`) → linked. My check isn't racing the component, so reading 2 is out. That means `create-venv.bat` should write `active: true` itself, and no project ever has a cold first launch. I'll make that change once the import test confirms the environment is genuinely usable. **The status message is structural, not a one-off.** The component finds environments by parent-folder name, so any project whose folder isn't named exactly like its env will show it. That's the unavoidable cost of the correctly-named environment — the alternative is putting `0020 - ` back in the repo. Worth knowing it also implicates the component's *Export requirements.txt* and *Create from requirements.txt* pulses, which are described in the same folder-relative terms; if those turn out to misbehave too, package management for these projects should go through `pip` in the venv directly rather than the component's UI. I'll pull `cowsay` back out once we have the answer. **jms:** okay. but what am i looking for? **Claude:** Open the textport (**Alt+T**, or Dialogs → Textport and DATs), paste that line, press Enter. **Working** — a path ending inside the project's venv: ``` C:\Users\jms\Documents\wtkns.com\300-Code\330 - TouchDesigner\0020 - TDPyMovieplayer\TDPyMovieplayer_vEnv\Lib\site-packages\cowsay\__init__.py ``` The part that matters is `TDPyMovieplayer_vEnv\Lib\site-packages` in the middle. That means TouchDesigner is importing from the environment we built, and the component's warning is cosmetic. **Not working** — an error instead: ``` ModuleNotFoundError: No module named 'cowsay' ``` That means my startup check is lying and I have a bug to fix. Paste me whichever you get. **jms:** looks good. C:\Users\jms\Documents\wtkns.com\300-Code\330 - TouchDesigner\0020 - TDPyMovieplayer\TDPyMovieplayer_vEnv\Lib\site-packages\cowsay\__init__.py **Claude:** Confirmed — the environment is genuinely working, so the component's warning is cosmetic. Cleaning up the test package and making the change that removes the cold first launch. Now the test and the docs note about the component's status message. Now propagating `create-venv.bat` to the project — it's a substituted file, so I'll regenerate it exactly as the generator would and verify. Now correcting the vault pages, which still carry the claim I've since disproved. That import settles it. All three repos are pushed. **What your test proved.** The environment is genuinely usable — TouchDesigner imported from `TDPyMovieplayer_vEnv\Lib\site-packages`, not from a path that merely looked right. `cowsay` is uninstalled again. **The one real defect, now fixed** (framework `f177a1f`, project `05808bb`). `active` was the gate after all. The helper writes `"active": false` because it records `self.Ready`, which the CLI path never sets, and TouchDesigner skips linking when it reads that. `create-venv.bat` now flips it after a successful run, so no project starts cold — your two launches were the last time anyone sees that. **The status message is permanent and cosmetic.** Derivative's parameter docs say vEnvs are created "with a name matching the parent folder", and *Active* governs "detection of a matching vEnv" — the component *discovers* environments by folder name, not just names them that way. An environment named for the project is invisible to its UI while linking fine through `envName` in the context file. Documented in both READMEs and on both vault pages, with the practical consequence: use `TDPyMovieplayer_vEnv/Scripts/pip`, not the component's *Export requirements.txt* / *Create from requirements.txt* pulses, which are described in the same folder-relative terms. **Where I went wrong, and what it cost.** I gave you the manual-linking caveat, then walked it back on source-reading, then the log restored the original. The walk-back was the mistake: `startAsActive` is read from the context and never used *in the helper*, which made the flag look inert — but the component's extension acts on it, and that code is inside the `.tox`, which is fully compressed and unreadable. No amount of further reading would have settled it. Your two launches did, in about a minute. That's now written down on 330.0010 as the lesson, not just the conclusion. Tests are at 26 passing, including one asserting `create-venv.bat` marks the context active — so the first-launch problem can't quietly come back. The vault is committed and pushed (`0c426a1`), but that's only the corrections. The session log entry and transcript for this stretch still need writing — say "update and push" when you want them. **jms:** update and push **Claude:** Both code repos are clean and pushed. Writing the session log entry. Now memory — one addition that would save a future session from chasing a false alarm.