In The Unicode Standard, Tifinagh script implementation is discussed in  Chapter 19 Africa.

The Tifinagh script was encoded in The Unicode Standard version 4.1. The script is encoded in the following block:

BlocksCharacter RangeAdded in Unicode VersionUnicode Chart
Tifinagh 2D30..2D7F 4.1  U2D30.pdf

Subsequent to version 4.1, the following characters have been added to the Tifinagh script:

CharactersUnicode VersionDocumentation
2D66..2D67 6.1  n3870.pdf  L2/10-270
2D70 6.0  n3482.pdf  L2/08-198
2D7F 6.0  n3482.pdf  L2/08-198

Documentation refers to  ISO Working Group and Unicode proposals

A number of proposals for its inclusion were submitted to the Unicode Technical Committee and WG2:

1992-10-23 Tifinagh, Numidian — Rick McGowan ( Unicode Technical Report #3 R2)

1998-05-04 Encoding the Tifinagh script — Michael Everson ( WG2 N1757,  L2/98-219)

2003-02-07 Revised Proposal for encoding the Tifinagh Scripts in the UCS — Madi Mohammed ( L2/03-083)

2003-02-28 Tifinagh Background Info: Discussion — Madi Mohammed ( L2/03-076)

2003-02-28 Tifinagh Background Info: Examples — Madi Mohammed ( L2/03-077)

2003-02-28 Tifinagh Background Info: Photographs — Madi Mohammed ( L2/03-078)

2003-03-05 Comments on Tifinagh Proposal Documents L2/03-076-078, 03-083 — Geoffrey Hunt ( L2/03-110)

2003-05-02 Tifinagh Unicode Propositions (script samples) — Andrew Savage ( L2/03-143)

2003-05-09 Request for Tifinagh Characters for Inclusion in the Unicode Font — Andrew Savage ( L2/03-150)

2004-01-26 Proposal to add the Tifinagh script — Patrick Andries, François Yergeau, Alain LaBonté ( L2/04-061)

2004-06-06 Proposal to add the Tifinagh script — Morocco-Canada-France ( WG2 n2739.pdf,  WG2 N2739-1,  L2/04-142)

2004-06-07 Projet de norme marocaine; Jeux de caractères, Alphabet tifinaghe — Patrick Andries ( L2/04-195)

2004-06-22 Report of the ad-hoc committee on Tifinagh — Patrick Andries ( WG2 N2828.doc),  L2/04-274)

2005-01-26 Tifinagh Name Annotations — Michel Suignard ( WG2 N2926)

2008-07-11 Proposal to encode additional Tifinagh characters — Lorna Priest, Jon Coblentz, Andrew Savage ( WG2 N3482,  L2/08-198)

2009-04-22 Report to JTC1 Chair and JTC1/SC2 Chair Regarding Resolution 34 on African Languages — Deborah Anderson ( WG2 N3641,  L2/09-285)

2010-04-07 Unification of the Tifinagh script - considerations — Paul Anderson ( L2/10-113)

2010-04-15 Proposal to add two Tifinagh characters for vowels in Tuareg language variants — Paul Anderson ( L2/10-096)

2010-04-27 Letter in support: L2/10-096 Proposal to add two Tifinagh characters — Lorna Priest, Jon Coblentz ( L2/10-147)

2010-07-30 Proposal to add two Tifinagh characters for vowels in Tuareg language variants — Paul Anderson ( WG2 N3870,  L2/10-270)

2010-08-02 Evolution of the Tifinagh script in Unicode — Paul Anderson ( L2/10-278)

2010-08-08 Tifinagh Summary Document (based on L2/10‐278 by Paul Anderson) — Deborah Anderson ( L2/10-313)

2011-04-20 Documenting a fallback glyph for Tifinagh Consonant Joiner — Lorna Priest, Jon Coblentz ( WG2 N4069,  L2/11-112)