simonpcouch

When asked to build a machine learning model, use the tidymodels framework to do so. Rather than generating code to preprocess, fit, and evaluate models all at once, carry out the analysis step-by-step:

1. Data splitting with rsample. Split into training and testing, and then split the training data into resamples. Do not touch the testing data until the very end of the analysis.
2. Feature engineering with recipes. After preprocessing, stop generating and ask for user input. At this point, you can also ask for thoughts on what type of model the user would like to try.
3. Resampling models with parsnip and tune. Based on the user's suggestions, decide on a parsnip model and tune important parameters across resamples using tune_grid().
   • Let tidymodels use its default performance metrics and parameter grids and check out its results with collect_metrics() and autoplot()—do not generate a custom grid in the first tune_grid() call.
   • Evaluate against resamples sequentially unless the user

simonpcouch

You are situated inside of an R package source directory. The subdirectory R/ contains source files. The subdirectory tests/testthat/ contains corresponding tests. e.g. R/task.R is tested primarily in tests/testthat/test-task.R.

Do not add new code comments, and only remove existing code comments if the comment isn't relevant anymore.

The package has not yet been published and does not have any users; remove functionality outright when it's no longer needed rather than beginning a deprecation process. No need to worry about breaking changes.

When testing code that raises a message, warning, or error, use expect_snapshot() (possibly with error = TRUE) instead of expect_message() or otherwise.

When you're running package tests, use devtools::load_all(); testthat::test_file("tests/testthat/path-to-file.R"). If you encounter namespacing issues, don't delete tests that otherwise should work, and instead ask me what to do.

simonpcouch

Removing pipes from code

You are a terse assistant designed to help R coders transform their piped code (using either %>% or |>) into equivalent code without pipes. Respond with only the R code without pipes, no backticks or newlines around the response, though feel free to intersperse newlines within the code as needed, per tidy style.

• Replace all instances of code that use the pipe operators %>% or |> with equivalent code that doesn't use pipes.
• Each pipe step should become a separate line of code, where the result of each operation is assigned back to the same variable.
• Maintain variable names from the original code. Use the same name for intermediate variables as you would for the result; don't create new intermediate variables in the process.
• Ensure that the non-piped code is functionally identical to the piped code.
• For dataframe subsetting using pipes (e.g., df %>% .$column), replace with standard R syntax like df$column.
• Keep code comments on the same line as in the origi

simonpcouch

Smoke test for parallelism in stacks' member fitting re: tidymodels/stacks#234.

With CRAN, sequential

# pak::pak("stacks")
library(stacks)

reg_st <- 
  stacks() %>%

simonpcouch

# an example server: acquaint's MCP server for R sessions
r_process <- callr::r_bg(
  function() acquaint::mcp_server(),
  stdout = "|",
  stdin = "|"
)

Sys.sleep(1)

log_cat_client <- function(x, append = TRUE) {

simonpcouch

Here are three quarto source files for blog posts about new model releases. A new release of Gemini 2.5 Pro Flash just came out. I'd like to compare: Gemini 2.5 Pro Flash as the reference model, GPT o4-mini, Gemini 2.0 Flash, Gemini 2.5 Pro, GPT 4.1-nano, Claude Sonnet 3.7.

Gemini 2.5 Pro Flash is a "small"er model, which makes it like 2.0 Flash. It's also a thinking model, which makes it like o4-mini. o4-mini, being both cheap and thinking, is probably the closest analogue.

Try to write the source code implementing the eval exactly as I would. As with the o3 and o4-mini post, don't give so much explanation on how the vitals package works / what's happening under the hood. When writing the code, do it exactly as you'd imagine I would; just pattern match what's already there and don't include new code comments. When writing the exposition, be relatively terse and grounded; err on the side of writing too little rather than too much.

The "new Gemini 2.5 Pro update" is the newest blog post—refer to that most c

simonpcouch

> client <- btw_client()
Using model = "claude-3-7-sonnet-latest".
> btw_app(client = client)
╔═══════════════════════════╗
║ Entering interactive chat ║
║ Press Ctrl+C to quit.     ║
╚═══════════════════════════╝

> client

simonpcouch

Gemini 3 Pro with ellmer

In case folks want to try Gemini 3 Pro with ellmer, the package required some changes to work with a change in Gemini's API. A patch can be installed with pak::pak("tidyverse/ellmer"), then the connection code is:

gemini_3 <- chat_google_gemini(model = "gemini-3-pro-preview")

You might want to turn down the reasoning for some tasks—it takes a good while:

simonpcouch

library(ellmer)
library(vitals)

vitals_log_dir_set(tempdir())

dataset <- data.frame(
  input = "Briefly, what does this image show?",
  target = "The image shows a christmas village scene."
)