fix(sdk): curly template raises false TemplateFormatError when substituted values contain {{variable}} patterns

[stakeswky]

Summary

Fixes #3770

The curly template formatter ({{var}} syntax) raised a false TemplateFormatError when a substituted value happened to contain {{...}} patterns — even though all template variables were successfully replaced.

Root Cause

After substitution, compute_truly_unreplaced() re-scanned the rendered output for {{...}} patterns and intersected with the original placeholder set. It could not distinguish between genuinely unreplaced placeholders and {{...}} patterns injected by substituted values.

Fix

build_replacements() already returns an unresolved set — the placeholders that could not be resolved against the provided data. This set is computed before substitution, so it is immune to patterns in substituted values.

The fix replaces the post-scan approach with the pre-computed unresolved set in both affected code paths:

• sdk/agenta/sdk/types.py — PromptTemplate._format_with_template()
• sdk/agenta/sdk/workflows/handlers.py — _format_with_template()

The now-unused compute_truly_unreplaced() function is removed from both files.

Before / After

prompt = PromptTemplate(user_prompt="Hello {{name}}", template_format="curly")

# Before: raises TemplateFormatError("Unreplaced variables in curly template: ['name']")
# After:  returns "Hello I am {{name}}"
result = prompt.format(name="I am {{name}}")

Tests

Added sdk/tests/pytest/unit/test_curly_template.py with 5 test cases:

• Substituted value containing same placeholder pattern
• Substituted value containing different placeholder name
• Multiple variables where one value contains placeholder syntax
• Genuinely missing variable still raises error
• Normal case (no placeholder patterns in values)

[vercel]

@superman32432432 is attempting to deploy a commit to the agenta projects Team on Vercel.

A member of the Team first needs to authorize it.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

---

User seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[dosubot]

Related Documentation

Checked 0 published document(s) in 2 knowledge base(s). No updates required.

^{How did I do? Any feedback?}