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Shape Measurement Pipeline

Is CosmoStat/shapepipe beginner-friendly?

The maintainers of CosmoStat/shapepipe usually reply to a pull request within 1 day. 1 beginner-friendly issue is open now.

Stars
18
Forks
14
Open beginner issues
1
Indexed issues
89
Avg merge
1d 4h
Merged PRs (30d)
18
Dominant language
Python
License
MIT
Last GitHub push
Sep 14, 2026
Latest indexed
Sep 20, 2026
Contributing guide
Contributing guide
Code of conduct
Code of conduct
Beginner labels
help wanted

How to contribute to CosmoStat/shapepipe

  1. Read the contributing guide first: it says how the maintainers want changes proposed, tested and reviewed.
  2. Read its code of conduct: it covers issues and pull requests as well as chat.
  3. Your contributions will be published under the project's MIT license.
  4. Pick the open beginner-friendly issue below and comment that you want to work on it before you start.

Issues somebody may already be working on are listed last. List everything by date

  • Pin PSFEx's compiled-in SAMPLE_* candidate cuts explicitly in default.psfex
    Open

    Difficulty 1/5 Under an hour Newbie friendliness 85/100

    CosmoStat/shapepipe#919 ·

    Maintainers usually reply within 1 day

  • mask_query.flag_positions treats every negative map value as off-coverage
    Open

    Difficulty 2/5 1-3 hours Newbie friendliness 75/100

    CosmoStat/shapepipe#914 ·

    Maintainers usually reply within 1 day

  • interpsfex returns a single basis image for a constant (no POLDEG1) PSF model
    Open

    Difficulty 3/5 1-2 days Newbie friendliness 65/100

    CosmoStat/shapepipe#913 ·

    Maintainers usually reply within 1 day

  • final_cat.param requests IMAFLAGS_ISO that the unmasked tile chain never produces; sp_validation cuts on it
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    CosmoStat/shapepipe#912 ·

    Maintainers usually reply within 1 day

  • make_cat: spread-model size check can never fire; SM_DO_CLASSIFICATION silently ignored without its input
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 55/100

    CosmoStat/shapepipe#910 ·

    Maintainers usually reply within 1 day

  • Exclude the redundant dateline tiles and high-Dec tiles from the DR6 shape catalogue
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    CosmoStat/shapepipe#900 ·

    Maintainers usually reply within 1 day

  • make_cat: objects ngmix never fit get NGMIX sentinels but MCAL_FLAGS = 0
    Open

    Difficulty 2/5 1-3 hours Newbie friendliness 84/100

    CosmoStat/shapepipe#889 ·

    Maintainers usually reply within 1 day

  • Emit the instrument flags as a healsparse defect map for the survey footprint
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 55/100

    CosmoStat/shapepipe#878 ·

    Maintainers usually reply within 1 day

  • Make image simulations available
    May be free again @martinkilbinger claimed this 36 days ago, and no pull request is open. Open

    CosmoStat/shapepipe#870 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Run MLCal on UNIONS
    May be free again @martinkilbinger claimed this 64 days ago, and no pull request is open. Open

    CosmoStat/shapepipe#861 · 1 assignee ·

    Maintainers usually reply within 1 day

  • ngmix mcal_flags records nothing when metacal fails wholesale
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    CosmoStat/shapepipe#853 ·

    Maintainers usually reply within 1 day

  • Validate bright-star mask sizes via tangential shear around stars
    Open

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    CosmoStat/shapepipe#851 ·

    Maintainers usually reply within 1 day

  • Masking unification: external healsparse masks throughout ShapePipe
    May be free again @martinkilbinger claimed this 72 days ago, and no pull request is open. Open
    enhancement

    CosmoStat/shapepipe#845 · 2 comments · 2 assignees ·

    Maintainers usually reply within 1 day

  • Star-catalogue depth (r<22→r<23) and PSF-selection bias from flux-radius cut
    May be free again @calumhrmurray claimed this 72 days ago, and no pull request is open. Open

    CosmoStat/shapepipe#840 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Scale the v2 pipeline on Nibi to an area large enough for 2-pt statistics
    May be free again @martinkilbinger claimed this 72 days ago, and no pull request is open. Open

    CosmoStat/shapepipe#838 · 2 assignees ·

    Maintainers usually reply within 1 day

  • Merge shape + photometry masks by intersection; build N(x)/randoms mask
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    CosmoStat/shapepipe#837 ·

    Maintainers usually reply within 1 day

  • Investigate shear-noise/resolution anomaly on simple Gaussian non-grid sims
    Open

    Difficulty 5/5 Over a week Newbie friendliness 30/100

    CosmoStat/shapepipe#834 ·

    Maintainers usually reply within 1 day

  • Adopt Steven-Gwyn universal object IDs for v2
    May be free again @martinkilbinger claimed this 72 days ago, and no pull request is open. Open

    CosmoStat/shapepipe#832 · 1 assignee ·

    Maintainers usually reply within 1 day

  • A/B: azgauss vs fitgauss metacal reconvolution kernel
    Open

    Difficulty 5/5 Over a week Newbie friendliness 45/100

    CosmoStat/shapepipe#830 ·

    Maintainers usually reply within 1 day

  • A/B: 4-fold weight symmetrisation — shape impact and S/N cost
    Open

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    CosmoStat/shapepipe#815 ·

    Maintainers usually reply within 1 day

  • A/B: `BLEND_HANDLING = uberseg` vs `noisefill` — do the FLAGS=2 B-modes go away?
    May be free again @fabianhervaspeters claimed this 75 days ago, and no pull request is open. Open

    CosmoStat/shapepipe#814 · 1 assignee ·

    Maintainers usually reply within 1 day

  • A/B validation of off-by-default shape-measurement options
    Open

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    CosmoStat/shapepipe#813 · 1 comment ·

    Maintainers usually reply within 1 day

  • Dependency Dashboard
    Open

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    CosmoStat/shapepipe#798 ·

    Maintainers usually reply within 1 day

  • Star & PSF measurement quality
    Open

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    CosmoStat/shapepipe#792 ·

    Maintainers usually reply within 1 day

  • ngmix PSF fitter: drop the galaxy prior, adopt a metadetect-style dedicated PSF fit
    Open

    Difficulty 4/5 3-5 days Newbie friendliness 52/100

    CosmoStat/shapepipe#778 ·

    Maintainers usually reply within 1 day

  • ShapePipe — longer-term improvements (not blocking the ngmix v2.0 merge)
    Open

    Difficulty 5/5 Over a week Newbie friendliness 20/100

    CosmoStat/shapepipe#773 ·

    Maintainers usually reply within 1 day

  • ngmix: the reduced-χ² anomaly on stars (error model)
    May be free again @fabianhervaspeters claimed this 88 days ago, and no pull request is open. Open

    CosmoStat/shapepipe#769 · 2 assignees ·

    Maintainers usually reply within 1 day

  • ShapePipe verification test suite (live science guardrails)
    Open
    tests

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    CosmoStat/shapepipe#765 · 1 comment ·

    Maintainers usually reply within 1 day

  • [NEW FEATURE] Fourth-order moments
    May be free again @sachaguer claimed this 502 days ago, and no pull request is open. Open
    enhancement

    CosmoStat/shapepipe#697 · 2 assignees ·

    Maintainers usually reply within 1 day

  • MCCD: restore to PSFEx parity
    May be free again @martinkilbinger claimed this 946 days ago, and no pull request is open. Open
    bug

    CosmoStat/shapepipe#674 · 1 comment · 1 assignee ·

    Maintainers usually reply within 1 day

  • [NEW FEATURE] Incorrect config file module section name
    May be free again @martinkilbinger claimed this 1010 days ago, and no pull request is open. Open
    enhancement

    CosmoStat/shapepipe#671 · 1 assignee ·

    Maintainers usually reply within 1 day

  • [BUG] MPI on candide
    May be free again @sfarrens claimed this 1042 days ago, and no pull request is open. Open
    bug

    CosmoStat/shapepipe#667 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Seed for random in SETools [BUG]
    Open
    bug

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    CosmoStat/shapepipe#659 ·

    Maintainers usually reply within 1 day

  • [BUG] WCS ngmix bug
    May be free again @lbaumo claimed this 1053 days ago, and no pull request is open. Open
    bug

    CosmoStat/shapepipe#656 · 1 comment · 1 reaction · 1 assignee ·

    Maintainers usually reply within 1 day

  • add object IDs to output catalog that correspond to sextractor catalog [NEW FEATURE]
    May be free again @lbaumo claimed this 1053 days ago, and no pull request is open. Open
    enhancement

    CosmoStat/shapepipe#655 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Clean up object size usage
    May be free again @martinkilbinger claimed this 1164 days ago, and no pull request is open. Open
    clean up

    CosmoStat/shapepipe#644 · 1 comment · 1 assignee ·

    Maintainers usually reply within 1 day

  • [INSTALL ISSUE] MPI4PY installation bug
    May be free again @sfarrens claimed this 1165 days ago, and no pull request is open. Open
    install issue

    CosmoStat/shapepipe#643 · 1 comment · 1 assignee ·

    Maintainers usually reply within 1 day

  • [BUG] change the PATH in post_proc_sp.bash into the right one
    May be free again @martinkilbinger claimed this 1180 days ago, and no pull request is open. Open
    bug

    CosmoStat/shapepipe#640 · 1 comment · 1 assignee ·

    Maintainers usually reply within 1 day

  • [HELP]
    May be free again @martinkilbinger claimed this 1053 days ago, and no pull request is open. Open
    help wanted

    CosmoStat/shapepipe#635 · 4 comments · 1 assignee ·

    Maintainers usually reply within 1 day

  • [NEW FEATURE] CI for Cent-OS
    May be free again @martinkilbinger claimed this 1207 days ago, and no pull request is open. Open
    enhancement

    CosmoStat/shapepipe#633 · 1 comment · 1 assignee ·

    Maintainers usually reply within 1 day

  • [NEW FEATURE]Include sextractor FLUX_RADIUS in the final output catalog
    May be free again @martinkilbinger claimed this 1053 days ago, and no pull request is open. Open
    enhancement

    CosmoStat/shapepipe#631 · 1 comment · 1 assignee ·

    Maintainers usually reply within 1 day

  • [BUG] MCCD interpolation
    May be free again @martinkilbinger claimed this 1215 days ago, and no pull request is open. Open
    bug

    CosmoStat/shapepipe#630 · 1 comment · 1 assignee ·

    Maintainers usually reply within 1 day

  • [documentation] CORRECT_FILE_PATTERN
    Open
    bug documentation help wanted

    CosmoStat/shapepipe#622 · 1 assignee ·

    Maintainers usually reply within 1 day

  • [Potential BUG] pixel scale in Messier config section
    May be free again @martinkilbinger claimed this 1277 days ago, and no pull request is open. Open
    bug

    CosmoStat/shapepipe#620 · 1 assignee ·

    Maintainers usually reply within 1 day

  • [BUG]Problems with primary hdu
    Open
    bug

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    CosmoStat/shapepipe#619 ·

    Maintainers usually reply within 1 day

  • [BUG] Linux CI job fails
    May be free again @sfarrens claimed this 1318 days ago, and no pull request is open. Open
    bug

    CosmoStat/shapepipe#614 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Remove the SIP to PV conversion
    May be free again @lbaumo claimed this 1319 days ago, and no pull request is open. Open
    enhancement

    CosmoStat/shapepipe#612 · 3 comments · 1 assignee ·

    Maintainers usually reply within 1 day

  • [NEW FEATURE]Change postage stamp size
    May be free again @lbaumo claimed this 1319 days ago, and no pull request is open. Open
    enhancement

    CosmoStat/shapepipe#611 · 2 comments · 1 assignee ·

    Maintainers usually reply within 1 day

  • [NEW FEATURE] Local position in the validation catalogue for MCCD
    May be free again @tobias-liaudat claimed this 1339 days ago, and no pull request is open. Open
    enhancement

    CosmoStat/shapepipe#610 · 1 reaction · 1 assignee ·

    Maintainers usually reply within 1 day

  • [NEW FEATURE]Dummy masked images
    May be free again @fabianhervaspeters claimed this 1349 days ago, and no pull request is open. Open
    enhancement

    CosmoStat/shapepipe#605 · 7 comments · 1 assignee ·

    Maintainers usually reply within 1 day

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