C · C++Apache-2.0★ 172 stars⑂ 43 forkssince Apr 2016View on GitHub ↗
amazon-ion/ion-c holds a health index of 58 out of 100, placing it in the Moderate band. It scores highest on Community & Adoption (73/100) and lowest on AI Readiness (39/100). It was last updated 72 days ago. 2 contributors account for most of its recent work.
58
overall / 100
Moderate
Software health index
Metrics are grouped into weighted categories on one standardized 1–100 scale. Overall starts as their weighted mean; when public evidence triggers the High-Risk Jurisdiction Policy, the rating is adjusted and receives an At risk ceiling of 49. AI Readiness sits outside the overall score.
58
Excellent85-100Exemplary; meets essentially all checked criteria
Good70-84Healthy; minor gaps
Moderate50-69Acceptable with notable gaps; review recommended
At risk30-49Significant weaknesses; adoption warrants caution
Critical1-29Severe problems (abandoned, single-maintainer, no hygiene)
Score profile
Each axis is a category. The shape matters more than the average — a healthy subject fills the whole shape, while a spike-and-crater profile means strength in one dimension is masking risk in another.
How well is the repo equipped to be developed and maintained with AI coding agents? An independent, experimental badge — weight 0.0, so it is surfaced on its own and does not affect the overall health score.
Manageable file sizes — 14/157 source files over 60KB
Inputs used
primary_language
C
largest_source_bytes
397,599
source_files_sampled
157
oversized_source_files
14
Key facts
172GitHub stars
25contributors
5commits, last 12 months
72days since last push
12releases
2bus factor
72open issues
—package ecosystems
Data collection warnings
Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
More detail
Star and fork history 0 ★ / 43 ⇿
0Stars
43Forks
12Releases
When each star and fork was added, collected from GitHub and bucketed by day. Cumulative growth sits directly above the daily additions it is made of, so the two read against each other: steady organic accretion looks nothing like an abrupt, short-lived burst. Where that difference is measurable, it is reported as growth authenticity.
Major 1Minor 2Patch 9
Each point covers 9 days.
OpenSSF Scorecard 5.6 / 10
5.6aggregate
Independent, tool-agnostic security assessment from the open-source OpenSSF Scorecard. Each check rewards a security practice, not a specific vendor's tool. Checks Scorecard could not determine are marked n/a and excluded from the security score (never counted as zero).Scorecard v5.5.0 · 2026-07-25 09:57 UTC
Full resolved dependency set from the GitHub dependency graph: 0 direct and 0 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.
Registry
Package
Version
Relation
Dependency advisories not assessed
Advisory matching could not run for this report: No resolved dependencies to assess
Raw JSON report machine-readable
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"is_bot": false,
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"headline": "Fix pattern in perf regression workflow paths to include sub-director…",
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"headline": "Add write permissions for documentation generation GHA (#335)",
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"headline": "Add write benchmark to perf regression workflow (#334)",
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"body": "…benchmark. (#333)\n\n* Fix empty symbol handling in tape generation; Clear tape when data is loaded\r\n\r\n* Remove commented printf",
"is_bot": false,
"headline": "Fix empty symbol handling and tape growth in ion-bench serialize_all …",
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"body": "* Add performance regression testing workflow\r\n\r\n* Remove dependency installs from testing, GHA should have these installed already\r\n\r\n* Add depth, and request tags, for code checkout\r\n\r\n* Changes from PR feedback",
"is_bot": false,
"headline": "Add performance regression testing workflow (#332)",
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"body": "* Fix decimal seperator loss, and annotation tracking when performing JSON downconverion\r\n\r\n* Add one more test for decimal json conversion list separator",
"is_bot": false,
"headline": "Fix two issues with JSON downconversion. (#328)",
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"body": "* Add version API and pull version w/ hash during build\r\n\r\n* Move gtest up, and update it; Add new dependencies for ion-bench tool\r\n\r\n* Update tests and build for updated gtest; Add option to not include tests in build\r\n\r\n* Add ion-bench tool for performing (de-)serialization benchmarks\r\n\r\n* Remove \n[…]\nal, fixes crash during ion_decimal_free when uninitialized data sets decimal to NUMBER type\r\n\r\n* Put verbose debug output behind a cmake flag\r\n\r\n* Address feedback; Fix typos and remove commented code",
"is_bot": false,
"headline": "Add Benchmark CLI for format comparison and perf tracking (#329)",
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"headline": "Add version number to decNumber to ensure soft link creation",
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"headline": "Bump version to 1.1.2",
"author_name": "Richard Giliam",
"author_login": "nirosys",
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"body": "* Fix buffer corruption when read data is left over from page fill; handle NULL curr & limit for no data\r\n\r\n* Fix read errors in user managed streams not bubbling up\r\n\r\n* Fix unit test failure; Handler returning IERR_OK, and NULL ptrs resulted in error",
"is_bot": false,
"headline": "Fix user managed stream data corruption. (#323)",
"author_name": "Richard Giliam",
"author_login": "nirosys",
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"headline": "Update version to 1.1.1",
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"headline": "Fix user stream reading to carry out multiple handler calls when needed",
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"headline": "Add missing macro usage to allow building with DEBUG defined",
"author_name": "Richard Giliam",
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"headline": "Address formatting and consistency feedback from #310",
"author_name": "Richard Giliam",
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{
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"body": null,
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"headline": "Update all references to the GitHub organization: amzn -> amazon-ion",
"author_name": "Matthew Pope",
"author_login": "popematt",
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{
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"headline": "Updates document to add the Ion cookbook link. (#312)",
"author_name": "Eric Chen",
"author_login": "cheqianh",
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"headline": "Bump version to 1.1.0",
"author_name": "Richard Giliam",
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"headline": "Fix misplaced preproc that caused msvc builds to report invalid float",
"author_name": "Richard Giliam",
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"committed_at": "2022-12-06T08:53:35Z",
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{
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"headline": "Add step to build/test workflow to force xcode 14.1 use on macos",
"author_name": "Richard Giliam",
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{
"oid": "1ed8f6c3369a23ec146378553af2251b9af2a4cd",
"body": "This commit adds functionality to the ion text writer to allow for\na basic lossy conversion to JSON encoding.\n\nAn existing issue that needs some consensus is how multiple top-level\nvalues are handled. With this commit multiple top-level items are\nserialized with no delimeter. This is supported by some JSON parsers,\nsuch the one used by the tool jq, but may be an issue with others. A\nsimple hacky fix can be added to place all top-level values into a list.",
"is_bot": false,
"headline": "Add support for down-converting ion to JSON",
"author_name": "Richard Giliam",
"author_login": "nirosys",
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{
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"headline": "Close readers in recently added unit tests",
"author_name": "Richard Giliam",
"author_login": "nirosys",
"committed_at": "2022-08-29T20:44:34Z",
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{
"oid": "cb246eaddc016486417c545b5f5ae4146c0a96fc",
"body": "…the current value from a text reader. (#278)",
"is_bot": false,
"headline": "Adds ion_reader_get_value_position for fetching the line & column of …",
"author_name": "David Lurton",
"author_login": "dlurton",
"committed_at": "2022-08-24T21:53:39Z",
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{
"oid": "ec9e060c7db59521feb8adffa90919ad74eb38d6",
"body": null,
"is_bot": false,
"headline": "Fix UB via NULL ptr dereference when output is NULL",
"author_name": "Richard Giliam",
"author_login": "nirosys",
"committed_at": "2022-08-23T19:29:55Z",
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{
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"headline": "Fix UB from calling memcmp with NULL arguments",
"author_name": "Richard Giliam",
"author_login": "nirosys",
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{
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"headline": "fix _ion_writer_add_annotation_helper memory accumulation",
"author_name": "Peter Soos",
"author_login": "peter-soos",
"committed_at": "2022-08-01T20:10:43Z",
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{
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"body": null,
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"headline": "Fix NULL dereferences from previous commit",
"author_name": "Richard Giliam",
"author_login": "nirosys",
"committed_at": "2022-07-14T20:27:36Z",
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{
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"body": null,
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"headline": "Fix leak of stream and reader when cleaning up reader contexts",
"author_name": "Richard Giliam",
"author_login": "nirosys",
"committed_at": "2022-07-14T20:27:36Z",
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{
"oid": "b90c8bd364bf77acedb555fce993eaa8379a18c5",
"body": "ion_cli_open_writer was not setting the writer context's has_imports to\ntrue after adding shared imports, which resulted in the imports not\nbeing closed when the writer was closed.",
"is_bot": false,
"headline": "Fix leak from unclosed shared imports",
"author_name": "Richard Giliam",
"author_login": "nirosys",
"committed_at": "2022-07-14T20:27:36Z",
"body_truncated": false,
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{
"oid": "6b4936ae014b6fc6ca06a1faff3233d82798c97e",
"body": "Prior to this commit when a binary writer was closed,\nbut could not be flushed, the _ion_writer_close_helper\nfunction would skip _ion_writer_binary_close, which\nresulted in the binary writer's _value_stream being\nleaked.\n\nThis commit updates the close functions for both binary\nand text formats to in\n[…]\nf\nwe want to flush or not. _ion_writer_close_helper was then\nupdated to track if we are able to flush and provide\nthat info to the format writer's close, so we can ensure\nall resources are cleaned up.",
"is_bot": false,
"headline": "Fix leak of resources when unable to flush writer",
"author_name": "Richard Giliam",
"author_login": "nirosys",
"committed_at": "2022-07-14T19:46:59Z",
"body_truncated": true,
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{
"oid": "20b0c8d10ca6c87b1293e5ed0406cc8fc1fded0c",
"body": "The writer's _pending_temp_entity_pool is moved over to\n_temp_entity_pool while transitioning from the symtab\nintercept state, when depth is zero.\n\nPrior to this commit if the writer was closed prior to that\ntransition, the data pointed to by _pending_temp_entity_pool\nwould be leaked. This commit adds checking during\n_ion_writer_free to ensure the pending temp entity pool is\nfreed if needed, similar to how the temp entity pool is freed.",
"is_bot": false,
"headline": "Fix memleak when writer is closed prior to closing containers",
"author_name": "Richard Giliam",
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{
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"body": null,
"is_bot": false,
"headline": "Fix leaked event when removing from stream",
"author_name": "Richard Giliam",
"author_login": "nirosys",
"committed_at": "2022-07-14T19:19:39Z",
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{
"oid": "5db57f6d0266cb83c33774676a57481816be5cad",
"body": "Prior to this commit, ion_event_stream_read_event did not completely\nclean up the internal string data for annotation symbols (name and\nimport_location) and the current p_value_field_name.",
"is_bot": false,
"headline": "Fix string data leaks after reading an event",
"author_name": "Richard Giliam",
"author_login": "nirosys",
"committed_at": "2022-07-14T19:19:39Z",
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{
"oid": "7d0c29141d675cab779c435d09ccd3c3d1496181",
"body": null,
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"headline": "Fix leak of reader during path extraction",
"author_name": "Richard Giliam",
"author_login": "nirosys",
"committed_at": "2022-07-14T19:18:07Z",
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{
"oid": "9654552af084a34d2ed042c8096a797dd2e1cc19",
"body": null,
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"headline": "Address LeakSanitizer errors in unit tests",
"author_name": "Richard Giliam",
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{
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"body": "When running with sanitizers enabled some of the functionality in\r\ndecNumber and a few places within ion-c itself, triggers runtime\r\nsanitizer checks. I've disabled specific sanitizer checks on the\r\nfunctions that exhibit the behaviors in order to quiet the\r\nsanitizers, with the expectation that a s\n[…]\n ways to implement the code without\r\nchanging functionality, that would not exhibit these behaviors.\r\nIt would be ideal to revisit each case and eliminate the need for\r\ndisabling the sanitizer checks.",
"is_bot": false,
"headline": "Disable sanitizer checks where known behaviors occur (#299)",
"author_name": "Richard Giliam",
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"headline": "Initialize uninitialized extractor option structs",
"author_name": "Richard Giliam",
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"committed_at": "2022-06-29T21:34:52Z",
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{
"oid": "2365924e084f03e95fe26a767cdccc846cce38a5",
"body": "The original ordering of the for loop's condition resulted in\nthe memcpy of 4 bytes being completed before the actual bounds\nchecking was done. During testing, due to the starting offset,\nthis resulted in reading two bytes beyond the `acc` buffer.\nThe end result would not cause any data corruption, but\ntriggered sanitizer checks during debug execution.",
"is_bot": false,
"headline": "Fix bug resulting in read overflow of stack allocated buffer",
"author_name": "Richard Giliam",
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{
"oid": "bdb8feeff626b478c80767082ed3891dfaab9ef3",
"body": "Rarely, the compiler/linker will decide to put `gSystemSymbolMemory` on\na smaller alignment boundary (e.g. 4 bytes) than what is required for\nthe data it contains. `gSystemSymbolMemory` is declared as a `char[]`,\nbut is really being used as generic backing memory for the system symbol\ntable and any\n[…]\nd pointer and add an aligned offset to it; in the case that you\nstart with a misaligned pointer, you'll at least get the right pointer\nback with a round trip conversion, rather than a misaligned one).",
"is_bot": false,
"headline": "Align all memory used by the system symbol table",
"author_name": "Chris Sadler",
"author_login": "sadderchris",
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"headline": "fix broken clob parsing when scanning unknown lobs",
"author_name": "Chris Sadler",
"author_login": "sadderchris",
"committed_at": "2022-04-26T18:15:50Z",
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{
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"body": null,
"is_bot": false,
"headline": "fix random bytes in ION_COLLECTION_NODE->data",
"author_name": "Michael Wallner",
"author_login": "m6w6",
"committed_at": "2022-04-06T18:38:11Z",
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"headline": "align temp buffer allocations to pointer size to prevent misaligned a…",
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"headline": "fix #292: bad alloc performance due to excessive memset",
"author_name": "Michael Wallner",
"author_login": "m6w6",
"committed_at": "2022-04-06T18:38:11Z",
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{
"oid": "98e8043b58e310d3ca03928956c7ea6caed02c69",
"body": null,
"is_bot": false,
"headline": "Bump to version 1.0.6 (#291)",
"author_name": "jobarr-amzn",
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"body": "…#290)",
"is_bot": false,
"headline": "adds a safety check for buffer boundary while parsing ion timestamp (…",
"author_name": "Khushboo",
"author_login": "desaikd",
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"headline": "Bump version to 1.0.5 (#289)",
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"headline": "chore: enable ubsan and asan in debug build script",
"author_name": "Chris Sadler",
"author_login": "sadderchris",
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"inputs": {
"primary_language": "C",
"largest_source_bytes": 397599,
"source_files_sampled": 157,
"oversized_source_files": 14
},
"components": [
{
"key": "type_checkable_code",
"name": "Type-checkable code",
"detail": "C (statically typed)",
"points": 45,
"status": "met",
"details": [
{
"code": "statically_typed_language",
"params": {
"language": "C"
}
}
],
"max_points": 45
},
{
"key": "manageable_file_sizes",
"name": "Manageable file sizes",
"detail": "14/157 source files over 60KB",
"points": 50.1,
"status": "partial",
"details": [
{
"code": "oversized_source_files",
"params": {
"kb": 60,
"sampled": 157,
"oversized": 14
}
}
],
"max_points": 55
}
]
}
],
"description": "How well is the repo equipped to be developed and maintained with AI coding agents? An independent, experimental badge — weight 0.0, so it is surfaced on its own and does not affect the overall health score."
}
],
"metrics_version": "1.13.0"
},
"warnings": [
"Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token"
],
"report_type": "repository",
"generated_at": "2026-07-25T09:58:11.455315Z",
"schema_version": "0.27.0",
"badge_url": "https://raw.githubusercontent.com/inspect-software/badges/main/v1/a/amazon-ion/ion-c.svg",
"full_name": "amazon-ion/ion-c",
"license_state": "standard",
"license_spdx": "Apache-2.0"
}
Scores are signals, not warranties. They reflect publicly visible practices on GitHub — not a code audit, and not a security guarantee.
Missing data is excluded and weights renormalized, never scored as zero. Methodology is versioned and open: metrics v1.13.0, schema v0.27.0 — full methodology · metrics wiki.
