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Proposal: Add PEP 561 support to enable static analysis in downstream projects

Status: Open.

#691 In casact/chainladder-python;

· cstotzer opened on Apr 7, 2026

Odd behavior with multi-part trend adjustment

Status: Open.

#689 In casact/chainladder-python;

· slisajacobson opened on Mar 31, 2026

Allow different policy length in ParallelogramOLF

Effort > Brief 🐇Small tasks expected to take a few hours up to a couple of days.Small tasks expected to take a few hours up to a couple of days.

Great First Contribution! 🌱Beginner friendly tickets with narrow scope and huge impact. Perfect to join our community!Beginner friendly tickets with narrow scope and huge impact. Perfect to join our community!

Impact > Minor 🔷Small, backward compatible change. Treat like a patch release (e.g., 0.5.8 → 0.5.9).Small, backward compatible change. Treat like a patch release (e.g., 0.5.8 → 0.5.9).

Status: Open.

Feature

#686 In casact/chainladder-python;

· kennethshsu opened on Mar 26, 2026

Paid and OS development mismatch

Effort > Brief 🐇Small tasks expected to take a few hours up to a couple of days.Small tasks expected to take a few hours up to a couple of days.

Great First Contribution! 🌱Beginner friendly tickets with narrow scope and huge impact. Perfect to join our community!Beginner friendly tickets with narrow scope and huge impact. Perfect to join our community!

Impact > Minor 🔷Small, backward compatible change. Treat like a patch release (e.g., 0.5.8 → 0.5.9).Small, backward compatible change. Treat like a patch release (e.g., 0.5.8 → 0.5.9).

Status: Open.

Bug

#678 In casact/chainladder-python;

· Ismail-Humayun opened on Mar 13, 2026

Enable passthrough of arguments to scipy.optimize.minimize via ClarkLDF.fit

Effort > Moderate 🐕Mid-sized tasks estimated to take a few days to a few weeks.Mid-sized tasks estimated to take a few days to a few weeks.

Impact > Moderate 🔶User-visible but non-breaking change. Treated like a minor version bump (e.g., 0.6.5 → 0.7.0).User-visible but non-breaking change. Treated like a minor version bump (e.g., 0.6.5 → 0.7.0).

Status: Open.

Feature

#669 In casact/chainladder-python;

· genedan opened on Jan 29, 2026

Pandas 3.0 Prep

Effort > Moderate 🐕Mid-sized tasks estimated to take a few days to a few weeks.Mid-sized tasks estimated to take a few days to a few weeks.

Impact > Moderate 🔶User-visible but non-breaking change. Treated like a minor version bump (e.g., 0.6.5 → 0.7.0).User-visible but non-breaking change. Treated like a minor version bump (e.g., 0.6.5 → 0.7.0).

Status: Open.

Bug

#664 In casact/chainladder-python;

· henrydingliu opened on Jan 25, 2026

Add "inplace" parameter to TriangleBase.rename

Effort > Moderate 🐕Mid-sized tasks estimated to take a few days to a few weeks.Mid-sized tasks estimated to take a few days to a few weeks.

Impact > Significant 💠High impact changes. Should only be done in response with community inputs.High impact changes. Should only be done in response with community inputs.

Status: Open.

Feature

#662 In casact/chainladder-python;

· genedan opened on Jan 24, 2026

Triangle dimension metadata fails to update after TriangleBase.rename

Effort > Brief 🐇Small tasks expected to take a few hours up to a couple of days.Small tasks expected to take a few hours up to a couple of days.

Great First Contribution! 🌱Beginner friendly tickets with narrow scope and huge impact. Perfect to join our community!Beginner friendly tickets with narrow scope and huge impact. Perfect to join our community!

Impact > Minor 🔷Small, backward compatible change. Treat like a patch release (e.g., 0.5.8 → 0.5.9).Small, backward compatible change. Treat like a patch release (e.g., 0.5.8 → 0.5.9).

Status: Open.

Feature

#655 In casact/chainladder-python;

· genedan opened on Jan 21, 2026

implement linting and formatting process

Effort > Brief 🐇Small tasks expected to take a few hours up to a couple of days.Small tasks expected to take a few hours up to a couple of days.

Impact > Minor 🔷Small, backward compatible change. Treat like a patch release (e.g., 0.5.8 → 0.5.9).Small, backward compatible change. Treat like a patch release (e.g., 0.5.8 → 0.5.9).

Refactor 🔧Code level improvements that restructure existing logic without changing behavior.Code level improvements that restructure existing logic without changing behavior.

Status: Open.

#651 In casact/chainladder-python;

· hutch3232 opened on Jan 21, 2026

Autoregressive parameter in DevelopmentML method

Effort > Moderate 🐕Mid-sized tasks estimated to take a few days to a few weeks.Mid-sized tasks estimated to take a few days to a few weeks.

Impact > Moderate 🔶User-visible but non-breaking change. Treated like a minor version bump (e.g., 0.6.5 → 0.7.0).User-visible but non-breaking change. Treated like a minor version bump (e.g., 0.6.5 → 0.7.0).

Status: Open.

Feature

#644 In casact/chainladder-python;

· henrydingliu opened on Jan 12, 2026

Option to manually select triangle grain

Effort > Moderate 🐕Mid-sized tasks estimated to take a few days to a few weeks.Mid-sized tasks estimated to take a few days to a few weeks.

Impact > Moderate 🔶User-visible but non-breaking change. Treated like a minor version bump (e.g., 0.6.5 → 0.7.0).User-visible but non-breaking change. Treated like a minor version bump (e.g., 0.6.5 → 0.7.0).

Status: Open.

Feature

#630 In casact/chainladder-python;

· LegendaryPie opened on Dec 12, 2025

Adding Age-to-Age Factor Smoothing

Effort > Moderate 🐕Mid-sized tasks estimated to take a few days to a few weeks.Mid-sized tasks estimated to take a few days to a few weeks.

Great First Contribution! 🌱Beginner friendly tickets with narrow scope and huge impact. Perfect to join our community!Beginner friendly tickets with narrow scope and huge impact. Perfect to join our community!

Impact > Moderate 🔶User-visible but non-breaking change. Treated like a minor version bump (e.g., 0.6.5 → 0.7.0).User-visible but non-breaking change. Treated like a minor version bump (e.g., 0.6.5 → 0.7.0).

Status: Open.

Feature

#622 In casact/chainladder-python;

· Hendrik240298 opened on Nov 16, 2025